diff --git a/packages/source/src/source.ts b/packages/source/src/source.ts
index ba40800f55..e5ae7681f6 100644
--- a/packages/source/src/source.ts
+++ b/packages/source/src/source.ts
@@ -128,13 +128,14 @@ export default class Source extends EventEmitter {
         id < this.originData.features.length
           ? this.originData.features[id]
           : 'null';
+      const newFeature = cloneDeep(feature);
       if (this.transforms.length !== 0) {
         const item = this.data.dataArray.find((dataItem: IParseDataItem) => {
           return dataItem._id === id;
         });
-        feature.properties = item;
+        newFeature.properties = item;
       }
-      return feature;
+      return newFeature;
     } else {
       return id < this.data.dataArray.length ? this.data.dataArray[id] : 'null';
     }