diff --git a/web/app/components/workflow/hooks/use-checklist.ts b/web/app/components/workflow/hooks/use-checklist.ts
index 306139cfa2..167b8936c7 100644
--- a/web/app/components/workflow/hooks/use-checklist.ts
+++ b/web/app/components/workflow/hooks/use-checklist.ts
@@ -41,7 +41,7 @@ import type { DataSet } from '@/models/datasets'
 import { fetchDatasets } from '@/service/datasets'
 import { MAX_TREE_DEPTH } from '@/config'
 import useNodesAvailableVarList from './use-nodes-available-var-list'
-import { getNodeUsedVars, isConversationVar, isENV, isSystemVar } from '../nodes/_base/components/variable/utils'
+import { getNodeUsedVars, isSpecialVar } from '../nodes/_base/components/variable/utils'
 
 export const useChecklist = (nodes: Node[], edges: Edge[]) => {
   const { t } = useTranslation()
@@ -122,10 +122,8 @@ export const useChecklist = (nodes: Node[], edges: Edge[]) => {
           const availableVars = map[node.id].availableVars
 
           for (const variable of usedVars) {
-            const isEnv = isENV(variable)
-            const isConvVar = isConversationVar(variable)
-            const isSysVar = isSystemVar(variable)
-            if (!isEnv && !isConvVar && !isSysVar) {
+            const isSpecialVars = isSpecialVar(variable[0])
+            if (!isSpecialVars) {
               const usedNode = availableVars.find(v => v.nodeId === variable?.[0])
               if (usedNode) {
                 const usedVar = usedNode.vars.find(v => v.variable === variable?.[1])
@@ -165,7 +163,7 @@ export const useChecklist = (nodes: Node[], edges: Edge[]) => {
     })
 
     return list
-  }, [nodes, edges, buildInTools, customTools, workflowTools, language, nodesExtraData, t, strategyProviders, getCheckData, getStartNodes, getToolIcon, dataSourceList])
+  }, [nodes, getStartNodes, nodesExtraData, edges, buildInTools, customTools, workflowTools, language, dataSourceList, getToolIcon, strategyProviders, getCheckData, t, map])
 
   return needWarningNodes
 }
diff --git a/web/app/components/workflow/nodes/_base/components/variable-tag.tsx b/web/app/components/workflow/nodes/_base/components/variable-tag.tsx
index d73a3d4924..0815f85134 100644
--- a/web/app/components/workflow/nodes/_base/components/variable-tag.tsx
+++ b/web/app/components/workflow/nodes/_base/components/variable-tag.tsx
@@ -14,7 +14,7 @@ import { BlockEnum } from '@/app/components/workflow/types'
 import { Line3 } from '@/app/components/base/icons/src/public/common'
 import { Variable02 } from '@/app/components/base/icons/src/vender/solid/development'
 import { BubbleX, Env } from '@/app/components/base/icons/src/vender/line/others'
-import { getNodeInfoById, isConversationVar, isENV, isSystemVar } from '@/app/components/workflow/nodes/_base/components/variable/utils'
+import { getNodeInfoById, isConversationVar, isENV, isRagVariableVar, isSystemVar } from '@/app/components/workflow/nodes/_base/components/variable/utils'
 import Tooltip from '@/app/components/base/tooltip'
 import cn from '@/utils/classnames'
 import { isExceptionVariable } from '@/app/components/workflow/utils'
@@ -43,7 +43,8 @@ const VariableTag = ({
 
   const isEnv = isENV(valueSelector)
   const isChatVar = isConversationVar(valueSelector)
-  const isValid = Boolean(node) || isEnv || isChatVar
+  const isRagVar = isRagVariableVar(valueSelector)
+  const isValid = Boolean(node) || isEnv || isChatVar || isRagVar
 
   const variableName = isSystemVar(valueSelector) ? valueSelector.slice(0).join('.') : valueSelector.slice(1).join('.')
   const isException = isExceptionVariable(variableName, node?.data.type)
diff --git a/web/app/components/workflow/nodes/_base/components/variable/var-reference-picker.tsx b/web/app/components/workflow/nodes/_base/components/variable/var-reference-picker.tsx
index 3026226452..2ee35b855b 100644
--- a/web/app/components/workflow/nodes/_base/components/variable/var-reference-picker.tsx
+++ b/web/app/components/workflow/nodes/_base/components/variable/var-reference-picker.tsx
@@ -295,7 +295,7 @@ const VarReferencePicker: FC<Props> = ({
     const isEnv = isENV(value as ValueSelector)
     const isChatVar = isConversationVar(value as ValueSelector)
     const isRagVar = isRagVariableVar(value as ValueSelector)
-    const isValidVar = Boolean(outputVarNode) || isEnv || isChatVar
+    const isValidVar = Boolean(outputVarNode) || isEnv || isChatVar || isRagVar
     const isException = isExceptionVariable(varName, outputVarNode?.type)
     return {
       isEnv,