diff --git a/web/app/components/workflow/constants.ts b/web/app/components/workflow/constants.ts
index bc652a22b3..c2bba4b40b 100644
--- a/web/app/components/workflow/constants.ts
+++ b/web/app/components/workflow/constants.ts
@@ -249,3 +249,10 @@ export const LLM_OUTPUT_STRUCT: Var[] = [
     ],
   },
 ]
+
+export const KNOWLEDGE_RETRIEVAL_OUTPUT_STRUCT: Var[] = [
+  {
+    variable: 'result',
+    type: VarType.arrayObject,
+  },
+]
diff --git a/web/app/components/workflow/nodes/_base/components/variable/utils.ts b/web/app/components/workflow/nodes/_base/components/variable/utils.ts
index c449d38964..24be9ec027 100644
--- a/web/app/components/workflow/nodes/_base/components/variable/utils.ts
+++ b/web/app/components/workflow/nodes/_base/components/variable/utils.ts
@@ -1,7 +1,7 @@
 import { BlockEnum, InputVarType, VarType } from '@/app/components/workflow/types'
 import type { StartNodeType } from '@/app/components/workflow/nodes/start/types'
 import type { NodeOutPutVar } from '@/app/components/workflow/types'
-import { LLM_OUTPUT_STRUCT, SUPPORT_OUTPUT_VARS_NODE } from '@/app/components/workflow/constants'
+import { KNOWLEDGE_RETRIEVAL_OUTPUT_STRUCT, LLM_OUTPUT_STRUCT, SUPPORT_OUTPUT_VARS_NODE } from '@/app/components/workflow/constants'
 
 const inputVarTypeToVarType = (type: InputVarType): VarType => {
   if (type === InputVarType.number)
@@ -35,6 +35,11 @@ const formatItem = (item: any): NodeOutPutVar => {
       res.vars = LLM_OUTPUT_STRUCT
       break
     }
+
+    case BlockEnum.KnowledgeRetrieval: {
+      res.vars = KNOWLEDGE_RETRIEVAL_OUTPUT_STRUCT
+      break
+    }
   }
 
   return res
diff --git a/web/app/components/workflow/types.ts b/web/app/components/workflow/types.ts
index 38dbf85780..0ae12c48c8 100644
--- a/web/app/components/workflow/types.ts
+++ b/web/app/components/workflow/types.ts
@@ -126,6 +126,7 @@ export enum VarType {
   array = 'Array',
   arrayString = 'Array[string]',
   arrayNumber = 'Array[number]',
+  arrayObject = 'Array[object]',
 }
 
 export type Var = {