diff --git a/web/app/components/workflow/hooks/__tests__/use-nodes-available-var-list.spec.ts b/web/app/components/workflow/hooks/__tests__/use-nodes-available-var-list.spec.ts
index 55db395f2e..1f5654ebda 100644
--- a/web/app/components/workflow/hooks/__tests__/use-nodes-available-var-list.spec.ts
+++ b/web/app/components/workflow/hooks/__tests__/use-nodes-available-var-list.spec.ts
@@ -1,5 +1,7 @@
 import type { Node, NodeOutPutVar, Var } from '../../types'
 import { renderHook } from '@testing-library/react'
+import { useSnippetDetailStore } from '@/app/components/snippets/store'
+import { PipelineInputVarType } from '@/models/pipeline'
 import { BlockEnum, VarType } from '../../types'
 import useNodesAvailableVarList, { useGetNodesAvailableVarList } from '../use-nodes-available-var-list'
 
@@ -42,6 +44,8 @@ const outputVars: NodeOutPutVar[] = [{
 describe('useNodesAvailableVarList', () => {
   beforeEach(() => {
     vi.clearAllMocks()
+    globalThis.history.pushState({}, '', '/')
+    useSnippetDetailStore.getState().reset()
     mockGetBeforeNodesInSameBranchIncludeParent.mockImplementation((nodeId: string) => [createNode({ id: `before-${nodeId}` })])
     mockGetTreeLeafNodes.mockImplementation((nodeId: string) => [createNode({ id: `leaf-${nodeId}` })])
     mockGetNodeAvailableVars.mockReturnValue(outputVars)
@@ -76,7 +80,7 @@ describe('useNodesAvailableVarList', () => {
     expect(mockGetBeforeNodesInSameBranchIncludeParent).toHaveBeenCalledWith('loop-1')
     expect(mockGetBeforeNodesInSameBranchIncludeParent).toHaveBeenCalledWith('child-1')
     expect(result.current['loop-1']?.availableNodes.map(node => node.id)).toEqual(['before-loop-1', 'loop-1'])
-    expect(result.current['child-1']?.availableVars).toBe(outputVars)
+    expect(result.current['child-1']?.availableVars).toEqual(outputVars)
     expect(mockGetNodeAvailableVars).toHaveBeenNthCalledWith(2, expect.objectContaining({
       parentNode: loopNode,
       isChatMode: true,
@@ -86,6 +90,37 @@ describe('useNodesAvailableVarList', () => {
     }))
   })
 
+  it('adds snippet input fields as virtual start variables on snippet canvases', () => {
+    globalThis.history.pushState({}, '', '/snippets/snippet-1/orchestrate')
+    useSnippetDetailStore.getState().setFields([{
+      type: PipelineInputVarType.textInput,
+      label: 'Topic',
+      variable: 'topic',
+      required: true,
+    }])
+
+    const currentNode = createNode({ id: 'node-a' })
+
+    const { result } = renderHook(() => useNodesAvailableVarList([currentNode], {
+      filterVar: () => true,
+    }))
+
+    expect(result.current['node-a']?.availableNodes[0]).toEqual(expect.objectContaining({
+      id: 'start',
+      data: expect.objectContaining({
+        type: BlockEnum.Start,
+      }),
+    }))
+    expect(result.current['node-a']?.availableVars[0]).toEqual(expect.objectContaining({
+      nodeId: 'start',
+      isStartNode: true,
+      vars: [expect.objectContaining({
+        variable: 'topic',
+        type: VarType.string,
+      })],
+    }))
+  })
+
   it('returns a callback version that can use leaf nodes or caller-provided nodes', () => {
     const firstNode = createNode({ id: 'node-a' })
     const secondNode = createNode({ id: 'node-b' })
diff --git a/web/app/components/workflow/hooks/use-nodes-available-var-list.ts b/web/app/components/workflow/hooks/use-nodes-available-var-list.ts
index cb04b43002..23a77ba849 100644
--- a/web/app/components/workflow/hooks/use-nodes-available-var-list.ts
+++ b/web/app/components/workflow/hooks/use-nodes-available-var-list.ts
@@ -1,10 +1,15 @@
 import type { Node, NodeOutPutVar, ValueSelector, Var } from '@/app/components/workflow/types'
 import { useCallback } from 'react'
+import { useTranslation } from 'react-i18next'
+import { useSnippetDetailStore } from '@/app/components/snippets/store'
 import {
   useIsChatMode,
   useWorkflow,
   useWorkflowVariables,
 } from '@/app/components/workflow/hooks'
+import {
+  appendSnippetInputFieldVars,
+} from '@/app/components/workflow/nodes/_base/hooks/snippet-input-field-vars'
 import { BlockEnum } from '@/app/components/workflow/types'
 
 type Params = {
@@ -41,6 +46,8 @@ const useNodesAvailableVarList = (nodes: Node[], {
   onlyLeafNodeVar: false,
   filterVar: () => true,
 }) => {
+  const { t } = useTranslation()
+  const snippetInputFields = useSnippetDetailStore(s => s.fields)
   const { getTreeLeafNodes, getBeforeNodesInSameBranchIncludeParent } = useWorkflow()
   const { getNodeAvailableVars } = useWorkflowVariables()
   const isChatMode = useIsChatMode()
@@ -52,23 +59,31 @@ const useNodesAvailableVarList = (nodes: Node[], {
     const availableNodes = passedInAvailableNodes || (onlyLeafNodeVar ? getTreeLeafNodes(nodeId) : getBeforeNodesInSameBranchIncludeParent(nodeId))
     if (node.data.type === BlockEnum.Loop)
       availableNodes.push(node)
+    const snippetInputFieldAvailability = appendSnippetInputFieldVars({
+      availableNodes,
+      fields: snippetInputFields,
+      title: t('panelTitle', { ns: 'snippet' }),
+    })
 
     const {
       parentNode: iterationNode,
     } = getNodeInfo(nodeId, nodes)
 
-    const availableVars = getNodeAvailableVars({
-      parentNode: iterationNode,
-      beforeNodes: availableNodes,
-      isChatMode,
-      filterVar,
-      hideEnv,
-      hideChatVar,
-    })
+    const availableVars = [
+      ...snippetInputFieldAvailability.availableVars,
+      ...getNodeAvailableVars({
+        parentNode: iterationNode,
+        beforeNodes: availableNodes,
+        isChatMode,
+        filterVar,
+        hideEnv,
+        hideChatVar,
+      }),
+    ]
     const result = {
       node,
       availableVars,
-      availableNodes,
+      availableNodes: snippetInputFieldAvailability.availableNodes,
     }
     nodeAvailabilityMap[nodeId] = result
   })
@@ -76,6 +91,8 @@ const useNodesAvailableVarList = (nodes: Node[], {
 }
 
 export const useGetNodesAvailableVarList = () => {
+  const { t } = useTranslation()
+  const snippetInputFields = useSnippetDetailStore(s => s.fields)
   const { getTreeLeafNodes, getBeforeNodesInSameBranchIncludeParent } = useWorkflow()
   const { getNodeAvailableVars } = useWorkflowVariables()
   const isChatMode = useIsChatMode()
@@ -96,28 +113,36 @@ export const useGetNodesAvailableVarList = () => {
       const availableNodes = passedInAvailableNodes || (onlyLeafNodeVar ? getTreeLeafNodes(nodeId) : getBeforeNodesInSameBranchIncludeParent(nodeId))
       if (node.data.type === BlockEnum.Loop)
         availableNodes.push(node)
+      const snippetInputFieldAvailability = appendSnippetInputFieldVars({
+        availableNodes,
+        fields: snippetInputFields,
+        title: t('panelTitle', { ns: 'snippet' }),
+      })
 
       const {
         parentNode: iterationNode,
       } = getNodeInfo(nodeId, nodes)
 
-      const availableVars = getNodeAvailableVars({
-        parentNode: iterationNode,
-        beforeNodes: availableNodes,
-        isChatMode,
-        filterVar,
-        hideEnv,
-        hideChatVar,
-      })
+      const availableVars = [
+        ...snippetInputFieldAvailability.availableVars,
+        ...getNodeAvailableVars({
+          parentNode: iterationNode,
+          beforeNodes: availableNodes,
+          isChatMode,
+          filterVar,
+          hideEnv,
+          hideChatVar,
+        }),
+      ]
       const result = {
         node,
         availableVars,
-        availableNodes,
+        availableNodes: snippetInputFieldAvailability.availableNodes,
       }
       nodeAvailabilityMap[nodeId] = result
     })
     return nodeAvailabilityMap
-  }, [getTreeLeafNodes, getBeforeNodesInSameBranchIncludeParent, getNodeAvailableVars, isChatMode])
+  }, [getTreeLeafNodes, getBeforeNodesInSameBranchIncludeParent, getNodeAvailableVars, isChatMode, snippetInputFields, t])
   return {
     getNodesAvailableVarList,
   }
diff --git a/web/app/components/workflow/nodes/_base/hooks/snippet-input-field-vars.ts b/web/app/components/workflow/nodes/_base/hooks/snippet-input-field-vars.ts
new file mode 100644
index 0000000000..a0c84b7495
--- /dev/null
+++ b/web/app/components/workflow/nodes/_base/hooks/snippet-input-field-vars.ts
@@ -0,0 +1,108 @@
+import type { InputVarType, Node, NodeOutPutVar } from '@/app/components/workflow/types'
+import type { SnippetInputField } from '@/models/snippet'
+import { NODE_WIDTH } from '@/app/components/workflow/constants'
+import { BlockEnum } from '@/app/components/workflow/types'
+import { PipelineInputVarType } from '@/models/pipeline'
+import { inputVarTypeToVarType } from '../../data-source/utils'
+
+export const SNIPPET_INPUT_FIELD_NODE_ID = 'start'
+
+export const isSnippetCanvas = () => {
+  if (typeof globalThis.location === 'undefined')
+    return false
+
+  return /^\/snippets\/[^/]+\/orchestrate/.test(globalThis.location.pathname)
+}
+
+const toWorkflowInputType = (type: SnippetInputField['type']) => type as unknown as InputVarType
+
+export const buildSnippetInputFieldNode = (
+  fields: SnippetInputField[],
+  title: string,
+): Node | undefined => {
+  const variables = fields.filter(field => !!field.variable)
+
+  if (!variables.length)
+    return undefined
+
+  return {
+    id: SNIPPET_INPUT_FIELD_NODE_ID,
+    type: 'custom',
+    position: { x: 0, y: 0 },
+    width: NODE_WIDTH,
+    height: 80,
+    data: {
+      title,
+      desc: '',
+      type: BlockEnum.Start,
+      variables: variables.map(field => ({
+        type: toWorkflowInputType(field.type),
+        label: field.label,
+        variable: field.variable,
+        max_length: field.max_length,
+        default: field.default_value,
+        required: field.required,
+        options: field.options,
+        placeholder: field.placeholder,
+        unit: field.unit,
+        allowed_file_upload_methods: field.allowed_file_upload_methods,
+        allowed_file_types: field.allowed_file_types,
+        allowed_file_extensions: field.allowed_file_extensions,
+      })),
+    },
+  } as Node
+}
+
+export const buildSnippetInputFieldVars = (
+  fields: SnippetInputField[],
+  title: string,
+): NodeOutPutVar | undefined => {
+  const vars = fields
+    .filter(field => !!field.variable)
+    .map(field => ({
+      variable: field.variable,
+      type: inputVarTypeToVarType(field.type as PipelineInputVarType),
+      isParagraph: field.type === PipelineInputVarType.paragraph,
+      isSelect: field.type === PipelineInputVarType.select,
+      options: field.options,
+      required: field.required,
+      des: field.label,
+    }))
+
+  if (!vars.length)
+    return undefined
+
+  return {
+    nodeId: SNIPPET_INPUT_FIELD_NODE_ID,
+    title,
+    vars,
+    isStartNode: true,
+  }
+}
+
+export const appendSnippetInputFieldVars = ({
+  availableNodes,
+  fields,
+  title,
+}: {
+  availableNodes: Node[]
+  fields: SnippetInputField[]
+  title: string
+}) => {
+  const shouldAppendSnippetInputFields = isSnippetCanvas()
+    && fields.length > 0
+    && !availableNodes.some(node => node.data.type === BlockEnum.Start)
+  const snippetInputFieldNode = shouldAppendSnippetInputFields
+    ? buildSnippetInputFieldNode(fields, title)
+    : undefined
+  const snippetInputFieldVars = shouldAppendSnippetInputFields
+    ? buildSnippetInputFieldVars(fields, title)
+    : undefined
+
+  return {
+    availableNodes: snippetInputFieldNode
+      ? [snippetInputFieldNode, ...availableNodes]
+      : availableNodes,
+    availableVars: snippetInputFieldVars ? [snippetInputFieldVars] : [],
+  }
+}
diff --git a/web/app/components/workflow/nodes/_base/hooks/use-available-var-list.ts b/web/app/components/workflow/nodes/_base/hooks/use-available-var-list.ts
index f226900899..e94f94916f 100644
--- a/web/app/components/workflow/nodes/_base/hooks/use-available-var-list.ts
+++ b/web/app/components/workflow/nodes/_base/hooks/use-available-var-list.ts
@@ -1,4 +1,6 @@
 import type { Node, NodeOutPutVar, ValueSelector, Var } from '@/app/components/workflow/types'
+import { useTranslation } from 'react-i18next'
+import { useSnippetDetailStore } from '@/app/components/snippets/store'
 import {
   useIsChatMode,
   useWorkflow,
@@ -7,6 +9,7 @@ import {
 import { useStore as useWorkflowStore } from '@/app/components/workflow/store'
 import { BlockEnum } from '@/app/components/workflow/types'
 import { inputVarTypeToVarType } from '../../data-source/utils'
+import { appendSnippetInputFieldVars } from './snippet-input-field-vars'
 import useNodeInfo from './use-node-info'
 
 type Params = {
@@ -28,10 +31,17 @@ const useAvailableVarList = (nodeId: string, {
   onlyLeafNodeVar: false,
   filterVar: () => true,
 }) => {
+  const { t } = useTranslation()
+  const snippetInputFields = useSnippetDetailStore(s => s.fields)
   const { getTreeLeafNodes, getNodeById, getBeforeNodesInSameBranchIncludeParent } = useWorkflow()
   const { getNodeAvailableVars } = useWorkflowVariables()
   const isChatMode = useIsChatMode()
   const availableNodes = passedInAvailableNodes || (onlyLeafNodeVar ? getTreeLeafNodes(nodeId) : getBeforeNodesInSameBranchIncludeParent(nodeId))
+  const snippetInputFieldAvailability = appendSnippetInputFieldVars({
+    availableNodes,
+    fields: snippetInputFields,
+    title: t('panelTitle', { ns: 'snippet' }),
+  })
   const {
     parentNode: iterationNode,
   } = useNodeInfo(nodeId)
@@ -63,20 +73,24 @@ const useAvailableVarList = (nodeId: string, {
       })
     }
   }
-  const availableVars = [...getNodeAvailableVars({
-    parentNode: iterationNode,
-    beforeNodes: availableNodes,
-    isChatMode,
-    filterVar,
-    hideEnv,
-    hideChatVar,
-  }), ...dataSourceRagVars]
+  const availableVars = [
+    ...snippetInputFieldAvailability.availableVars,
+    ...getNodeAvailableVars({
+      parentNode: iterationNode,
+      beforeNodes: availableNodes,
+      isChatMode,
+      filterVar,
+      hideEnv,
+      hideChatVar,
+    }),
+    ...dataSourceRagVars,
+  ]
 
   return {
     availableVars,
-    availableNodes,
+    availableNodes: snippetInputFieldAvailability.availableNodes,
     availableNodesWithParent: [
-      ...availableNodes,
+      ...snippetInputFieldAvailability.availableNodes,
       ...(isDataSourceNode ? [currNode] : []),
     ],
   }