diff --git a/mateclaw-server/src/main/java/vip/mate/workspace/conversation/controller/ConversationController.java b/mateclaw-server/src/main/java/vip/mate/workspace/conversation/controller/ConversationController.java
index 1511096c..297e3722 100644
--- a/mateclaw-server/src/main/java/vip/mate/workspace/conversation/controller/ConversationController.java
+++ b/mateclaw-server/src/main/java/vip/mate/workspace/conversation/controller/ConversationController.java
@@ -13,6 +13,7 @@ import vip.mate.workspace.conversation.ConversationService;
 import vip.mate.workspace.conversation.vo.ConversationVO;
 import vip.mate.workspace.conversation.vo.MessageVO;
 
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 
@@ -27,6 +28,8 @@ import java.util.Map;
 @RequiredArgsConstructor
 public class ConversationController {
 
+    private static final int MAX_BATCH_DELETE_SIZE = 200;
+
     private final ConversationService conversationService;
     private final ChatStreamTracker streamTracker;
 
@@ -219,13 +222,22 @@ public class ConversationController {
         String username = auth != null ? auth.getName() : "anonymous";
         List<String> ids = body.get("conversationIds");
         if (ids == null || ids.isEmpty()) {
-            return R.fail("未指定要删除的会话");
+            return R.fail(400, "未指定要删除的会话");
+        }
+        LinkedHashSet<String> uniqueIds = new LinkedHashSet<>();
+        for (String id : ids) {
+            if (id != null && !id.isBlank()) {
+                uniqueIds.add(id.trim());
+            }
+        }
+        if (uniqueIds.isEmpty()) {
+            return R.fail(400, "未指定要删除的会话");
+        }
+        if (uniqueIds.size() > MAX_BATCH_DELETE_SIZE) {
+            return R.fail(400, "单次最多删除 " + MAX_BATCH_DELETE_SIZE + " 个会话");
         }
         int deleted = 0;
-        for (String conversationId : ids) {
-            if (conversationId == null || conversationId.isBlank()) {
-                continue;
-            }
+        for (String conversationId : uniqueIds) {
             if (!conversationService.isConversationOwner(conversationId, username)) {
                 continue;
             }
diff --git a/mateclaw-server/src/test/java/vip/mate/workspace/conversation/controller/ConversationControllerBatchDeleteTest.java b/mateclaw-server/src/test/java/vip/mate/workspace/conversation/controller/ConversationControllerBatchDeleteTest.java
new file mode 100644
index 00000000..ad7b65be
--- /dev/null
+++ b/mateclaw-server/src/test/java/vip/mate/workspace/conversation/controller/ConversationControllerBatchDeleteTest.java
@@ -0,0 +1,76 @@
+package vip.mate.workspace.conversation.controller;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.security.core.Authentication;
+import vip.mate.channel.web.ChatStreamTracker;
+import vip.mate.common.result.R;
+import vip.mate.workspace.conversation.ConversationService;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class ConversationControllerBatchDeleteTest {
+
+    @Mock private ConversationService conversationService;
+    @Mock private ChatStreamTracker streamTracker;
+    @Mock private Authentication authentication;
+
+    private ConversationController controller;
+
+    @BeforeEach
+    void setUp() {
+        controller = new ConversationController(conversationService, streamTracker);
+        when(authentication.getName()).thenReturn("alice");
+    }
+
+    @Test
+    void batchDelete_deduplicatesAndTrimsIds_beforeOwnershipCheck() {
+        when(conversationService.isConversationOwner("conv-1", "alice")).thenReturn(true);
+        when(conversationService.isConversationOwner("conv-2", "alice")).thenReturn(false);
+
+        R<Integer> result = controller.batchDelete(Map.of(
+                "conversationIds", List.of(" conv-1 ", "conv-1", "", "conv-2")), authentication);
+
+        assertEquals(1, result.getData());
+        verify(conversationService).isConversationOwner("conv-1", "alice");
+        verify(conversationService).isConversationOwner("conv-2", "alice");
+        verify(conversationService).deleteConversation("conv-1");
+        verify(conversationService, never()).deleteConversation("conv-2");
+    }
+
+    @Test
+    void batchDelete_rejectsBlankOnlyRequest() {
+        R<Integer> result = controller.batchDelete(Map.of(
+                "conversationIds", List.of("", "  ")), authentication);
+
+        assertNull(result.getData());
+        assertEquals(400, result.getCode());
+        verify(conversationService, never()).isConversationOwner(org.mockito.ArgumentMatchers.anyString(),
+                org.mockito.ArgumentMatchers.anyString());
+    }
+
+    @Test
+    void batchDelete_rejectsMoreThanMaximumUniqueIds() {
+        List<String> ids = new ArrayList<>();
+        for (int i = 0; i < 201; i++) ids.add("conv-" + i);
+
+        R<Integer> result = controller.batchDelete(Map.of("conversationIds", ids), authentication);
+
+        assertNull(result.getData());
+        assertEquals(400, result.getCode());
+        verify(conversationService, never()).isConversationOwner(org.mockito.ArgumentMatchers.anyString(),
+                org.mockito.ArgumentMatchers.anyString());
+    }
+}
diff --git a/mateclaw-ui/src/i18n/locales/en-US.ts b/mateclaw-ui/src/i18n/locales/en-US.ts
index 11142c85..7934c7a7 100644
--- a/mateclaw-ui/src/i18n/locales/en-US.ts
+++ b/mateclaw-ui/src/i18n/locales/en-US.ts
@@ -2256,6 +2256,18 @@ export default {
     deleteConfirm: 'Are you sure you want to delete this session?',
     deleteTitle: 'Confirm Delete',
     deleteFailed: 'Failed to delete session',
+    selectAll: 'Select all sessions on this page',
+    deselectAll: 'Deselect all',
+    selectSession: 'Select session "{title}"',
+    selectedCount: '{count} sessions selected',
+    clearSelection: 'Clear selection',
+    batchDelete: 'Delete selected',
+    deleting: 'Deleting...',
+    batchDeleteTitle: 'Confirm Bulk Delete',
+    batchDeleteConfirm: 'Delete the {count} selected sessions? This action cannot be undone.',
+    batchDeleteSuccess: 'Deleted {count} sessions',
+    batchDeletePartial: 'Deleted {deleted} of {total} sessions. The others may no longer exist or may not be accessible.',
+    batchDeleteFailed: 'Failed to delete selected sessions',
     switchModel: 'Switch the model used for this conversation',
     modelSwitched: 'Model switched',
     modelSwitchFailed: 'Failed to switch model',
diff --git a/mateclaw-ui/src/i18n/locales/zh-CN.ts b/mateclaw-ui/src/i18n/locales/zh-CN.ts
index 1b88251a..5c43c6b2 100644
--- a/mateclaw-ui/src/i18n/locales/zh-CN.ts
+++ b/mateclaw-ui/src/i18n/locales/zh-CN.ts
@@ -2130,6 +2130,18 @@ export default {
     deleteConfirm: '确定要删除这个会话吗？',
     deleteTitle: '确认删除',
     deleteFailed: '删除会话失败',
+    selectAll: '选中当前页全部会话',
+    deselectAll: '取消全选',
+    selectSession: '选中会话“{title}”',
+    selectedCount: '已选 {count} 个会话',
+    clearSelection: '取消选择',
+    batchDelete: '批量删除',
+    deleting: '删除中...',
+    batchDeleteTitle: '确认批量删除',
+    batchDeleteConfirm: '确定要删除选中的 {count} 个会话吗？此操作不可撤销。',
+    batchDeleteSuccess: '已删除 {count} 个会话',
+    batchDeletePartial: '已删除 {deleted}/{total} 个会话，其余会话可能已不存在或无权操作',
+    batchDeleteFailed: '批量删除会话失败',
     switchModel: '切换该会话使用的模型',
     modelSwitched: '已切换会话模型',
     modelSwitchFailed: '切换模型失败',
diff --git a/mateclaw-ui/src/views/Sessions.vue b/mateclaw-ui/src/views/Sessions.vue
index 1dea7d16..60f053f8 100644
--- a/mateclaw-ui/src/views/Sessions.vue
+++ b/mateclaw-ui/src/views/Sessions.vue
@@ -24,10 +24,34 @@
 
     <!-- 会话列表 -->
     <div class="sessions-table-wrap">
+      <div v-if="selectedSessionIds.length > 0" class="selection-toolbar" role="status">
+        <span>{{ t('sessions.selectedCount', { count: selectedSessionIds.length }) }}</span>
+        <div class="selection-actions">
+          <button class="selection-clear" :disabled="batchDeleting" @click="clearSelection">
+            {{ t('sessions.clearSelection') }}
+          </button>
+          <button class="selection-delete" :disabled="batchDeleting" @click="batchDeleteSessions">
+            <span v-if="batchDeleting" class="selection-spinner" aria-hidden="true"></span>
+            {{ batchDeleting ? t('sessions.deleting') : t('sessions.batchDelete') }}
+          </button>
+        </div>
+      </div>
       <div class="sessions-table-scroll">
       <table class="sessions-table">
         <thead>
           <tr>
+            <th class="selection-cell">
+              <input
+                type="checkbox"
+                class="session-checkbox"
+                :checked="allVisibleSelected"
+                :indeterminate="someVisibleSelected"
+                :disabled="sessions.length === 0 || batchDeleting"
+                :aria-label="t('sessions.selectAll')"
+                :title="allVisibleSelected ? t('sessions.deselectAll') : t('sessions.selectAll')"
+                @change="toggleSelectAll"
+              />
+            </th>
             <th>{{ t('sessions.columns.session') }}</th>
             <th>{{ t('sessions.columns.source') }}</th>
             <th>{{ t('sessions.columns.agent') }}</th>
@@ -39,7 +63,22 @@
           </tr>
         </thead>
         <tbody>
-          <tr v-for="session in sessions" :key="session.conversationId" class="session-row">
+          <tr
+            v-for="session in sessions"
+            :key="session.conversationId"
+            class="session-row"
+            :class="{ 'is-selected': isSelected(session.conversationId) }"
+          >
+            <td class="selection-cell">
+              <input
+                type="checkbox"
+                class="session-checkbox"
+                :checked="isSelected(session.conversationId)"
+                :disabled="batchDeleting"
+                :aria-label="t('sessions.selectSession', { title: session.title || session.conversationId })"
+                @change="toggleSessionSelection(session.conversationId)"
+              />
+            </td>
             <td>
               <div class="session-info">
                 <div class="session-title">{{ session.title }}</div>
@@ -107,7 +146,7 @@
             </td>
           </tr>
           <tr v-if="sessions.length === 0">
-            <td colspan="8" class="empty-row">
+            <td colspan="9" class="empty-row">
               <div class="empty-state">
                 <div class="empty-icon-ring">
                   <svg width="28" height="28" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round">
@@ -144,7 +183,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, onMounted, watch } from 'vue'
+import { ref, computed, onMounted, watch } from 'vue'
 import { useRouter } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import { mcToast } from '@/composables/useMcToast'
@@ -163,6 +202,14 @@ const searchText = ref('')
 const currentPage = ref(1)
 const pageSize = ref(20)
 const total = ref(0)
+const selectedSessionIds = ref<string[]>([])
+const batchDeleting = ref(false)
+
+const visibleSessionIds = computed(() => sessions.value.map(session => session.conversationId))
+const allVisibleSelected = computed(() => visibleSessionIds.value.length > 0
+  && visibleSessionIds.value.every(id => selectedSessionIds.value.includes(id)))
+const someVisibleSelected = computed(() => !allVisibleSelected.value
+  && visibleSessionIds.value.some(id => selectedSessionIds.value.includes(id)))
 
 // Per-conversation model selection state (closes #183). Loaded once on mount,
 // not per-row, because providers don't change during a session-list view.
@@ -207,6 +254,7 @@ async function loadSessions() {
     const body = res.data || {}
     sessions.value = body.records || []
     total.value = Number(body.total) || 0
+    clearSelection()
   } catch (e: any) { mcToast.error(t('sessions.loadFailed')) }
 }
 
@@ -234,10 +282,62 @@ async function deleteSession(conversationId: string) {
   if (!ok) return
   try {
     await conversationApi.delete(conversationId)
-    await loadSessions()
+    await reloadAfterDelete(1)
   } catch (e: any) { mcToast.error(t('sessions.deleteFailed')) }
 }
 
+function isSelected(conversationId: string) {
+  return selectedSessionIds.value.includes(conversationId)
+}
+
+function toggleSessionSelection(conversationId: string) {
+  selectedSessionIds.value = isSelected(conversationId)
+    ? selectedSessionIds.value.filter(id => id !== conversationId)
+    : [...selectedSessionIds.value, conversationId]
+}
+
+function toggleSelectAll() {
+  selectedSessionIds.value = allVisibleSelected.value ? [] : [...visibleSessionIds.value]
+}
+
+function clearSelection() {
+  selectedSessionIds.value = []
+}
+
+async function reloadAfterDelete(deletedCount: number) {
+  const remainingTotal = Math.max(0, total.value - deletedCount)
+  const lastPage = Math.max(1, Math.ceil(remainingTotal / pageSize.value))
+  if (currentPage.value > lastPage) currentPage.value = lastPage
+  await loadSessions()
+}
+
+async function batchDeleteSessions() {
+  const ids = [...selectedSessionIds.value]
+  if (ids.length === 0 || batchDeleting.value) return
+  const ok = await mcConfirm({
+    title: t('sessions.batchDeleteTitle'),
+    message: t('sessions.batchDeleteConfirm', { count: ids.length }),
+    tone: 'danger',
+  })
+  if (!ok) return
+
+  batchDeleting.value = true
+  try {
+    const res: any = await conversationApi.batchDelete(ids)
+    const deleted = Number(res.data) || 0
+    if (deleted === ids.length) {
+      mcToast.success(t('sessions.batchDeleteSuccess', { count: deleted }))
+    } else {
+      mcToast.warning(t('sessions.batchDeletePartial', { deleted, total: ids.length }))
+    }
+    await reloadAfterDelete(deleted)
+  } catch (e: any) {
+    mcToast.error(e?.message || t('sessions.batchDeleteFailed'))
+  } finally {
+    batchDeleting.value = false
+  }
+}
+
 // ==================== Model selection (#183) ====================
 
 /** Composite key consumed by ModelSelector: "{providerId}::{modelName}". */
@@ -442,6 +542,53 @@ function formatTime(time?: string) {
   backdrop-filter: blur(20px);
   -webkit-backdrop-filter: blur(20px);
 }
+.selection-toolbar {
+  min-height: 52px;
+  padding: 9px 16px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+  color: var(--mc-text-secondary);
+  font-size: 13px;
+  font-weight: 600;
+  background: var(--mc-primary-bg);
+  border-bottom: 1px solid var(--mc-border);
+}
+.selection-actions { display: flex; align-items: center; gap: 8px; }
+.selection-clear,
+.selection-delete {
+  min-height: 32px;
+  padding: 6px 12px;
+  border-radius: 8px;
+  border: 1px solid var(--mc-border);
+  font-size: 12px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: background 0.15s, border-color 0.15s, color 0.15s;
+}
+.selection-clear { color: var(--mc-text-secondary); background: var(--mc-bg-elevated); }
+.selection-clear:hover:not(:disabled) { color: var(--mc-primary); border-color: var(--mc-primary); }
+.selection-delete {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  color: var(--mc-text-inverse);
+  background: var(--mc-danger);
+  border-color: var(--mc-danger);
+}
+.selection-delete:hover:not(:disabled) { background: var(--mc-danger-hover); border-color: var(--mc-danger-hover); }
+.selection-clear:disabled,
+.selection-delete:disabled { opacity: 0.6; cursor: not-allowed; }
+.selection-spinner {
+  width: 12px;
+  height: 12px;
+  border: 2px solid currentColor;
+  border-right-color: transparent;
+  border-radius: 50%;
+  animation: selection-spin 0.7s linear infinite;
+}
+@keyframes selection-spin { to { transform: rotate(360deg); } }
 /* Inner scroller takes the horizontal overflow so the outer wrap can keep
    `overflow: hidden` — that's what makes the rounded corners actually clip
    the th background instead of letting it bleed into the top corners. */
@@ -451,7 +598,17 @@ function formatTime(time?: string) {
    if they truly need to (session title / id is the only multi-line cell). */
 .sessions-table th,
 .sessions-table td { white-space: nowrap; }
-.sessions-table td:first-child { white-space: normal; }
+.sessions-table td:nth-child(2) { white-space: normal; }
+.selection-cell { width: 44px; padding-left: 18px !important; padding-right: 4px !important; }
+.session-checkbox {
+  width: 16px;
+  height: 16px;
+  display: block;
+  margin: 0;
+  accent-color: var(--mc-primary);
+  cursor: pointer;
+}
+.session-checkbox:disabled { cursor: not-allowed; opacity: 0.55; }
 .sessions-table th {
   padding: 14px 18px;
   text-align: left;
@@ -465,6 +622,7 @@ function formatTime(time?: string) {
 }
 .session-row { border-bottom: 1px solid var(--mc-border-light); transition: background 0.12s; }
 .session-row:hover { background: var(--mc-bg-muted); }
+.session-row.is-selected { background: var(--mc-primary-bg); }
 .session-row:last-child { border-bottom: none; }
 .sessions-table td { padding: 16px 18px; font-size: 14px; color: var(--mc-text-primary); }
 .session-title { font-weight: 600; color: var(--mc-text-primary); margin-bottom: 3px; letter-spacing: -0.005em; }