diff --git a/packages/designer/src/document/node/props/prop.ts b/packages/designer/src/document/node/props/prop.ts
index bc846416d..05de1009b 100644
--- a/packages/designer/src/document/node/props/prop.ts
+++ b/packages/designer/src/document/node/props/prop.ts
@@ -159,7 +159,7 @@ export class Prop implements IPropParent {
           const v = prop.export(stage);
           if (v != null) {
             maps = maps || {};
-            maps[prop.key || key] = prop.export(stage);
+            maps[prop.key || key] = v;
           }
         }
       });
@@ -170,9 +170,13 @@ export class Prop implements IPropParent {
       if (!this._items) {
         return this._value;
       }
-      return this.items!.map((prop) => {
+      const values = this.items!.map((prop) => {
         return prop.export(stage);
       });
+      if (values.every(val => val === undefined)) {
+        return undefined;
+      }
+      return values;
     }
   }
 
diff --git a/packages/designer/tests/document/node/props/prop.test.ts b/packages/designer/tests/document/node/props/prop.test.ts
index 002a96871..ec447a902 100644
--- a/packages/designer/tests/document/node/props/prop.test.ts
+++ b/packages/designer/tests/document/node/props/prop.test.ts
@@ -430,6 +430,11 @@ describe('Prop 类测试', () => {
         // illegal
         // expect(prop.set(5, 1)).toBeNull();
       });
+
+      it('should return undefined when all items are undefined', () => {
+        prop = new Prop(mockedPropsInst, [undefined, undefined], '___loopArgs___');
+        expect(prop.getValue()).toBeUndefined();
+      });
     });
   });