diff --git a/web/app/components/app/configuration/dataset-config/index.tsx b/web/app/components/app/configuration/dataset-config/index.tsx
index 01ba8c606d..6165cfdeec 100644
--- a/web/app/components/app/configuration/dataset-config/index.tsx
+++ b/web/app/components/app/configuration/dataset-config/index.tsx
@@ -270,7 +270,7 @@ const DatasetConfig: FC = () => {
           handleMetadataModelChange={handleMetadataModelChange}
           handleMetadataCompletionParamsChange={handleMetadataCompletionParamsChange}
           isCommonVariable
-          availableCommonStringVars={promptVariablesToSelect.filter(item => item.type === MetadataFilteringVariableType.string)}
+          availableCommonStringVars={promptVariablesToSelect.filter(item => item.type === MetadataFilteringVariableType.string || item.type === MetadataFilteringVariableType.select)}
           availableCommonNumberVars={promptVariablesToSelect.filter(item => item.type === MetadataFilteringVariableType.number)}
         />
       </div>
diff --git a/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/condition-list/condition-item.tsx b/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/condition-list/condition-item.tsx
index 910d753532..398a2294e2 100644
--- a/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/condition-list/condition-item.tsx
+++ b/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/condition-list/condition-item.tsx
@@ -77,7 +77,9 @@ const ConditionItem = ({
 
   const valueAndValueMethod = useMemo(() => {
     if (
-      (currentMetadata?.type === MetadataFilteringVariableType.string || currentMetadata?.type === MetadataFilteringVariableType.number)
+      (currentMetadata?.type === MetadataFilteringVariableType.string
+       || currentMetadata?.type === MetadataFilteringVariableType.number
+       || currentMetadata?.type === MetadataFilteringVariableType.select)
       && typeof condition.value === 'string'
     ) {
       const regex = isCommonVariable ? COMMON_VARIABLE_REGEX : VARIABLE_REGEX
@@ -140,7 +142,9 @@ const ConditionItem = ({
         </div>
         <div className='border-t border-t-divider-subtle'>
           {
-            !comparisonOperatorNotRequireValue(condition.comparison_operator) && currentMetadata?.type === MetadataFilteringVariableType.string && (
+            !comparisonOperatorNotRequireValue(condition.comparison_operator)
+            && (currentMetadata?.type === MetadataFilteringVariableType.string
+             || currentMetadata?.type === MetadataFilteringVariableType.select) && (
               <ConditionString
                 valueMethod={localValueMethod}
                 onValueMethodChange={handleValueMethodChange}
diff --git a/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/condition-list/utils.ts b/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/condition-list/utils.ts
index fc6ae36b9e..0e7fbeb29c 100644
--- a/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/condition-list/utils.ts
+++ b/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/condition-list/utils.ts
@@ -22,6 +22,7 @@ export const isComparisonOperatorNeedTranslate = (operator?: ComparisonOperator)
 export const getOperators = (type?: MetadataFilteringVariableType) => {
   switch (type) {
     case MetadataFilteringVariableType.string:
+    case MetadataFilteringVariableType.select:
       return [
         ComparisonOperator.is,
         ComparisonOperator.isNot,
diff --git a/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/metadata-icon.tsx b/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/metadata-icon.tsx
index 5830a1a54a..4a3f539ef4 100644
--- a/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/metadata-icon.tsx
+++ b/web/app/components/workflow/nodes/knowledge-retrieval/components/metadata/metadata-icon.tsx
@@ -18,7 +18,7 @@ const MetadataIcon = ({
   return (
     <>
       {
-        type === MetadataFilteringVariableType.string && (
+        (type === MetadataFilteringVariableType.string || type === MetadataFilteringVariableType.select) && (
           <RiTextSnippet className={cn('h-3.5 w-3.5', className)} />
         )
       }
diff --git a/web/app/components/workflow/nodes/knowledge-retrieval/types.ts b/web/app/components/workflow/nodes/knowledge-retrieval/types.ts
index 5f8b39e02b..1cae4ecd3b 100644
--- a/web/app/components/workflow/nodes/knowledge-retrieval/types.ts
+++ b/web/app/components/workflow/nodes/knowledge-retrieval/types.ts
@@ -80,6 +80,7 @@ export enum MetadataFilteringVariableType {
   string = 'string',
   number = 'number',
   time = 'time',
+  select = 'select',
 }
 
 export type MetadataFilteringCondition = {