diff --git a/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/domain/bo/CompleteTaskBo.java b/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/domain/bo/CompleteTaskBo.java
index 87c742e0b..9c31df7db 100644
--- a/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/domain/bo/CompleteTaskBo.java
+++ b/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/domain/bo/CompleteTaskBo.java
@@ -28,6 +28,11 @@ public class CompleteTaskBo implements Serializable {
     @NotBlank(message = "任务id不能为空", groups = {AddGroup.class})
     private String taskId;
 
+    /**
+     * 附件id
+     */
+    private String fileId;
+
     /**
      * 消息类型
      */
diff --git a/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/flowable/cmd/AttachmentCmd.java b/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/flowable/cmd/AttachmentCmd.java
new file mode 100644
index 000000000..0257388d3
--- /dev/null
+++ b/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/flowable/cmd/AttachmentCmd.java
@@ -0,0 +1,68 @@
+package org.dromara.workflow.flowable.cmd;
+
+import cn.hutool.core.collection.CollUtil;
+import cn.hutool.core.util.StrUtil;
+import org.dromara.common.core.utils.SpringUtils;
+import org.dromara.common.core.utils.StreamUtils;
+import org.dromara.common.core.utils.StringUtils;
+import org.dromara.common.satoken.utils.LoginHelper;
+import org.dromara.system.domain.vo.SysOssVo;
+import org.dromara.system.service.ISysOssService;
+import org.flowable.common.engine.impl.interceptor.Command;
+import org.flowable.common.engine.impl.interceptor.CommandContext;
+import org.flowable.engine.impl.persistence.entity.AttachmentEntity;
+import org.flowable.engine.impl.persistence.entity.AttachmentEntityManager;
+import org.flowable.engine.impl.util.CommandContextUtil;
+
+import java.util.Arrays;
+import java.util.Date;
+import java.util.List;
+
+/**
+ * 串行加签
+ *
+ * @author 附件上传
+ */
+public class AttachmentCmd implements Command<Boolean> {
+
+    private final String fileId;
+
+    private final String taskId;
+
+    private final String processInstanceId;
+
+    public AttachmentCmd(String fileId, String taskId, String processInstanceId) {
+        this.fileId = fileId;
+        this.taskId = taskId;
+        this.processInstanceId = processInstanceId;
+    }
+
+    @Override
+    public Boolean execute(CommandContext commandContext) {
+        try {
+            if (StringUtils.isNotBlank(fileId)) {
+                List<Long> fileIds = StreamUtils.toList(Arrays.asList(fileId.split(StrUtil.COMMA)), Long::valueOf);
+                List<SysOssVo> sysOssVos = SpringUtils.getBean(ISysOssService.class).listByIds(fileIds);
+                if (CollUtil.isNotEmpty(sysOssVos)) {
+                    for (SysOssVo sysOssVo : sysOssVos) {
+                        AttachmentEntityManager attachmentEntityManager = CommandContextUtil.getAttachmentEntityManager();
+                        AttachmentEntity attachmentEntity = attachmentEntityManager.create();
+                        attachmentEntity.setRevision(1);
+                        attachmentEntity.setUserId(LoginHelper.getUserId().toString());
+                        attachmentEntity.setName(sysOssVo.getFileName());
+                        attachmentEntity.setDescription(sysOssVo.getOriginalName());
+                        attachmentEntity.setType(sysOssVo.getFileSuffix());
+                        attachmentEntity.setTaskId(taskId);
+                        attachmentEntity.setProcessInstanceId(processInstanceId);
+                        attachmentEntity.setContentId(sysOssVo.getOssId().toString());
+                        attachmentEntity.setTime(new Date());
+                        attachmentEntityManager.insert(attachmentEntity);
+                    }
+                }
+            }
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+        return true;
+    }
+}
diff --git a/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/service/impl/ActTaskServiceImpl.java b/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/service/impl/ActTaskServiceImpl.java
index 031d676f3..005a01a0b 100644
--- a/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/service/impl/ActTaskServiceImpl.java
+++ b/ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/service/impl/ActTaskServiceImpl.java
@@ -156,6 +156,9 @@ public class ActTaskServiceImpl implements IActTaskService {
                 taskService.complete(newTask.getId());
                 return true;
             }
+            //附件上传
+            AttachmentCmd attachmentCmd = new AttachmentCmd(completeTaskBo.getFileId(), task.getId(), task.getProcessInstanceId());
+            managementService.executeCommand(attachmentCmd);
             FlowProcessEventHandler processHandler = flowEventStrategy.getProcessHandler(processInstance.getProcessDefinitionKey());
             String businessStatus = WorkflowUtils.getBusinessStatus(task.getProcessInstanceId());
             if (BusinessStatusEnum.DRAFT.getStatus().equals(businessStatus) || BusinessStatusEnum.BACK.getStatus().equals(businessStatus) || BusinessStatusEnum.CANCEL.getStatus().equals(businessStatus)) {