diff --git a/web/app/components/base/prompt-editor/constants.tsx b/web/app/components/base/prompt-editor/constants.tsx
index b316297800..2dcc62706a 100644
--- a/web/app/components/base/prompt-editor/constants.tsx
+++ b/web/app/components/base/prompt-editor/constants.tsx
@@ -1,5 +1,4 @@
 import type { ValueSelector } from '../../workflow/types'
-import { uniqBy } from 'es-toolkit/compat'
 import { SupportUploadFileTypes } from '../../workflow/types'
 
 export const CONTEXT_PLACEHOLDER_TEXT = '{{#context#}}'
@@ -58,8 +57,7 @@ export const getInputVars = (text: string): ValueSelector[] => {
 
         return valueSelector
       })
-    const uniqueInputVars = uniqBy(inputVars, item => item.join('.'))
-    return uniqueInputVars
+    return inputVars
   }
   return []
 }
diff --git a/web/app/components/workflow/nodes/_base/components/before-run-form/index.tsx b/web/app/components/workflow/nodes/_base/components/before-run-form/index.tsx
index 98e8b36c90..4b7f65bcc1 100644
--- a/web/app/components/workflow/nodes/_base/components/before-run-form/index.tsx
+++ b/web/app/components/workflow/nodes/_base/components/before-run-form/index.tsx
@@ -4,6 +4,7 @@ import type { Props as FormProps } from './form'
 import type { Emoji } from '@/app/components/tools/types'
 import type { SpecialResultPanelProps } from '@/app/components/workflow/run/special-result-panel'
 import type { NodeRunningStatus } from '@/app/components/workflow/types'
+import type { HumanInputFormData } from '@/types/workflow'
 import * as React from 'react'
 import { useEffect, useRef } from 'react'
 import { useTranslation } from 'react-i18next'
@@ -35,7 +36,7 @@ export type BeforeRunFormProps = {
   showGeneratedForm?: boolean
   handleShowGeneratedForm?: (data: Record<string, any>) => void
   handleHideGeneratedForm?: () => void
-  formData?: any
+  formData?: HumanInputFormData
   handleSubmitHumanInputForm?: (data: any) => Promise<void>
   handleAfterHumanInputStepRun?: () => void
 } & Partial<SpecialResultPanelProps>
diff --git a/web/app/components/workflow/nodes/_base/components/workflow-panel/index.tsx b/web/app/components/workflow/nodes/_base/components/workflow-panel/index.tsx
index 8278579d58..57fea139f2 100644
--- a/web/app/components/workflow/nodes/_base/components/workflow-panel/index.tsx
+++ b/web/app/components/workflow/nodes/_base/components/workflow-panel/index.tsx
@@ -324,7 +324,7 @@ const BasePanel: FC<BasePanelProps> = ({
   const currentDataSource = useMemo(() => {
     if (data.type === BlockEnum.DataSource && data.provider_type !== DataSourceClassification.localFile)
       return dataSourceList?.find(item => item.plugin_id === data.plugin_id)
-  }, [dataSourceList, data.provider_id, data.type, data.provider_type])
+  }, [data.type, data.provider_type, data.plugin_id, dataSourceList])
 
   const handleAuthorizationItemClick = useCallback((credential_id: string) => {
     handleNodeDataUpdateWithSyncDraft({
diff --git a/web/app/components/workflow/nodes/human-input/components/delivery-method/index.tsx b/web/app/components/workflow/nodes/human-input/components/delivery-method/index.tsx
index 17e7fe20dd..c9b911896c 100644
--- a/web/app/components/workflow/nodes/human-input/components/delivery-method/index.tsx
+++ b/web/app/components/workflow/nodes/human-input/components/delivery-method/index.tsx
@@ -1,4 +1,4 @@
-import type { DeliveryMethod, DeliveryMethodType } from '../../types'
+import type { DeliveryMethod, DeliveryMethodType, FormInputItem } from '../../types'
 import type {
   Node,
   NodeOutPutVar,
@@ -19,6 +19,7 @@ type Props = {
   nodesOutputVars?: NodeOutPutVar[]
   availableNodes?: Node[]
   formContent?: string
+  formInputs?: FormInputItem[]
   onChange: (value: DeliveryMethod[]) => void
   readonly?: boolean
 }
@@ -29,6 +30,7 @@ const DeliveryMethodForm: React.FC<Props> = ({
   nodesOutputVars,
   availableNodes,
   formContent,
+  formInputs,
   onChange,
   readonly,
 }) => {
@@ -95,6 +97,7 @@ const DeliveryMethodForm: React.FC<Props> = ({
               nodesOutputVars={nodesOutputVars}
               availableNodes={availableNodes}
               formContent={formContent}
+              formInputs={formInputs}
               readonly={readonly}
             />
           ))}
diff --git a/web/app/components/workflow/nodes/human-input/components/delivery-method/method-item.tsx b/web/app/components/workflow/nodes/human-input/components/delivery-method/method-item.tsx
index 07daccca17..8432d68ee7 100644
--- a/web/app/components/workflow/nodes/human-input/components/delivery-method/method-item.tsx
+++ b/web/app/components/workflow/nodes/human-input/components/delivery-method/method-item.tsx
@@ -1,5 +1,5 @@
 import type { FC } from 'react'
-import type { DeliveryMethod, EmailConfig } from '../../types'
+import type { DeliveryMethod, EmailConfig, FormInputItem } from '../../types'
 import type {
   Node,
   NodeOutPutVar,
@@ -33,6 +33,7 @@ type DeliveryMethodItemProps = {
   nodesOutputVars?: NodeOutPutVar[]
   availableNodes?: Node[]
   formContent?: string
+  formInputs?: FormInputItem[]
   onChange: (method: DeliveryMethod) => void
   onDelete: (type: DeliveryMethodType) => void
   readonly?: boolean
@@ -44,6 +45,7 @@ const DeliveryMethodItem: FC<DeliveryMethodItemProps> = ({
   nodesOutputVars,
   availableNodes,
   formContent,
+  formInputs,
   onChange,
   onDelete,
   readonly,
@@ -187,6 +189,7 @@ const DeliveryMethodItem: FC<DeliveryMethodItemProps> = ({
           isShow={showTestEmailModal}
           config={method.config as EmailConfig}
           formContent={formContent}
+          formInputs={formInputs}
           nodesOutputVars={nodesOutputVars}
           availableNodes={availableNodes}
           onClose={() => setShowTestEmailModal(false)}
diff --git a/web/app/components/workflow/nodes/human-input/components/delivery-method/test-email-sender.tsx b/web/app/components/workflow/nodes/human-input/components/delivery-method/test-email-sender.tsx
index aa3cb126ec..c7b6047915 100644
--- a/web/app/components/workflow/nodes/human-input/components/delivery-method/test-email-sender.tsx
+++ b/web/app/components/workflow/nodes/human-input/components/delivery-method/test-email-sender.tsx
@@ -1,7 +1,8 @@
-import type { EmailConfig } from '../../types'
+import type { EmailConfig, FormInputItem } from '../../types'
 import type {
   Node,
   NodeOutPutVar,
+  ValueSelector,
 } from '@/app/components/workflow/types'
 import { RiArrowRightSFill, RiCloseLine } from '@remixicon/react'
 import { noop, unionBy } from 'es-toolkit/compat'
@@ -36,6 +37,7 @@ type EmailConfigureModalProps = {
   onClose: () => void
   config?: EmailConfig
   formContent?: string
+  formInputs?: FormInputItem[]
   nodesOutputVars?: NodeOutPutVar[]
   availableNodes?: Node[]
 }
@@ -69,6 +71,7 @@ const EmailSenderModal = ({
   onClose,
   config,
   formContent,
+  formInputs,
   nodesOutputVars = [],
   availableNodes = [],
 }: EmailConfigureModalProps) => {
@@ -86,8 +89,14 @@ const EmailSenderModal = ({
   const accounts = members?.accounts || []
 
   const generatedInputs = useMemo(() => {
+    const placeholderValueSelectors = (formInputs || []).reduce((acc, input) => {
+      if (input.placeholder.type === 'variable') {
+        acc.push(input.placeholder.selector)
+      }
+      return acc
+    }, [] as ValueSelector[])
     const valueSelectors = doGetInputVars((formContent || '') + (config?.body || ''))
-    const variables = unionBy(valueSelectors, item => item.join('.')).map((item) => {
+    const variables = unionBy([...valueSelectors, ...placeholderValueSelectors], item => item.join('.')).map((item) => {
       const varInfo = getNodeInfoById(availableNodes, item[0])?.data
 
       return {
@@ -120,7 +129,7 @@ const EmailSenderModal = ({
       }
     })
     return varInputs
-  }, [availableNodes, config?.body, formContent, nodesOutputVars])
+  }, [availableNodes, config?.body, formContent, formInputs, nodesOutputVars])
 
   const [inputs, setInputs] = useState<Record<string, unknown>>({})
   const [collapsed, setCollapsed] = useState(true)
diff --git a/web/app/components/workflow/nodes/human-input/components/single-run-form.tsx b/web/app/components/workflow/nodes/human-input/components/single-run-form.tsx
index 9dd4dccbb1..36e427e750 100644
--- a/web/app/components/workflow/nodes/human-input/components/single-run-form.tsx
+++ b/web/app/components/workflow/nodes/human-input/components/single-run-form.tsx
@@ -1,9 +1,9 @@
 'use client'
-import type { FormInputItem, UserAction } from '@/app/components/workflow/nodes/human-input/types'
+import type { HumanInputFormData } from '@/types/workflow'
 import { RiArrowLeftLine } from '@remixicon/react'
 import * as React from 'react'
-import { useState } from 'react'
 
+import { useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import Button from '@/app/components/base/button'
 import ContentItem from '@/app/components/base/chat/chat/answer/human-input-content/content-item'
@@ -11,11 +11,7 @@ import { getButtonStyle, initializeInputs, splitByOutputVar } from '@/app/compon
 
 type Props = {
   nodeName: string
-  data: {
-    form_content: string
-    inputs: FormInputItem[]
-    actions: UserAction[]
-  }
+  data: HumanInputFormData
   showBackButton?: boolean
   handleBack?: () => void
   onSubmit?: (data: any) => Promise<void>
@@ -67,6 +63,7 @@ const FormContent = ({
             formInputFields={data.inputs}
             inputs={inputs}
             onInputChange={handleInputsChange}
+            resolvedPlaceholderValues={data.resolved_placeholder_values}
           />
         ))}
         <div className="flex flex-wrap gap-1 py-1">
diff --git a/web/app/components/workflow/nodes/human-input/hooks/use-single-run-form-params.ts b/web/app/components/workflow/nodes/human-input/hooks/use-single-run-form-params.ts
index c47eba9b9a..d264fe9667 100644
--- a/web/app/components/workflow/nodes/human-input/hooks/use-single-run-form-params.ts
+++ b/web/app/components/workflow/nodes/human-input/hooks/use-single-run-form-params.ts
@@ -1,6 +1,7 @@
 import type { HumanInputNodeType } from '../types'
 import type { Props as FormProps } from '@/app/components/workflow/nodes/_base/components/before-run-form/form'
 import type { InputVar } from '@/app/components/workflow/types'
+import type { HumanInputFormData } from '@/types/workflow'
 import { useCallback, useMemo, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import { useStore as useAppStore } from '@/app/components/app/store'
@@ -28,13 +29,19 @@ const useSingleRunFormParams = ({
   const { t } = useTranslation()
   const { inputs } = useNodeCrud<HumanInputNodeType>(id, payload)
   const [showGeneratedForm, setShowGeneratedForm] = useState(false)
-  const [formData, setFormData] = useState<any>(null)
+  const [formData, setFormData] = useState<HumanInputFormData | null>(null)
   const [requiredInputs, setRequiredInputs] = useState<Record<string, any>>()
   const generatedInputs = useMemo(() => {
+    const placeholderInputs = inputs.inputs.reduce((acc, input) => {
+      if (input.placeholder.type === 'variable') {
+        acc.push(...getInputVars([`{{#${input.placeholder.selector.join('.')}#}}`]))
+      }
+      return acc
+    }, [] as InputVar[])
     if (!inputs.form_content)
-      return []
-    return getInputVars([inputs.form_content]).filter(item => !isOutput(item.value_selector || []))
-  }, [getInputVars, inputs.form_content])
+      return placeholderInputs
+    return [...placeholderInputs, ...getInputVars([inputs.form_content]).filter(item => !isOutput(item.value_selector || []))]
+  }, [getInputVars, inputs.form_content, inputs.inputs])
 
   const forms = useMemo(() => {
     const forms: FormProps[] = [{
diff --git a/web/app/components/workflow/nodes/human-input/panel.tsx b/web/app/components/workflow/nodes/human-input/panel.tsx
index 0374660a23..4cd8316f9b 100644
--- a/web/app/components/workflow/nodes/human-input/panel.tsx
+++ b/web/app/components/workflow/nodes/human-input/panel.tsx
@@ -89,6 +89,7 @@ const Panel: FC<NodePanelProps<HumanInputNodeType>> = ({
         nodeId={id}
         value={inputs.delivery_methods || []}
         formContent={inputs.form_content}
+        formInputs={inputs.inputs}
         nodesOutputVars={availableVars}
         availableNodes={availableNodesWithParent}
         onChange={handleDeliveryMethodChange}
diff --git a/web/eslint-suppressions.json b/web/eslint-suppressions.json
index 304548b8e4..03d3424830 100644
--- a/web/eslint-suppressions.json
+++ b/web/eslint-suppressions.json
@@ -3057,7 +3057,7 @@
   },
   "app/components/workflow/nodes/_base/components/before-run-form/index.tsx": {
     "ts/no-explicit-any": {
-      "count": 12
+      "count": 11
     }
   },
   "app/components/workflow/nodes/_base/components/editor/code-editor/editor-support-vars.tsx": {
@@ -3440,7 +3440,7 @@
   },
   "app/components/workflow/nodes/human-input/hooks/use-single-run-form-params.ts": {
     "ts/no-explicit-any": {
-      "count": 7
+      "count": 6
     }
   },
   "app/components/workflow/nodes/if-else/components/condition-list/condition-input.tsx": {
diff --git a/web/service/workflow.ts b/web/service/workflow.ts
index 4a660c7020..bffa2da088 100644
--- a/web/service/workflow.ts
+++ b/web/service/workflow.ts
@@ -1,10 +1,10 @@
-import type { FormInputItem, UserAction } from '@/app/components/workflow/nodes/human-input/types'
 import type { BlockEnum } from '@/app/components/workflow/types'
 import type { CommonResponse } from '@/models/common'
 import type { FlowType } from '@/types/common'
 import type {
   ConversationVariableResponse,
   FetchWorkflowDraftResponse,
+  HumanInputFormData,
   NodesDefaultConfigsResponse,
   VarInInspect,
 } from '@/types/workflow'
@@ -111,11 +111,7 @@ export const fetchHumanInputNodeStepRunForm = (
     inputs: Record<string, any>
   },
 ) => {
-  return post<{
-    form_content: string
-    inputs: FormInputItem[]
-    user_actions: UserAction[]
-  }>(`${url}/preview`, { body: data })
+  return post<HumanInputFormData>(`${url}/preview`, { body: data })
 }
 
 export const submitHumanInputNodeStepRunForm = (