diff --git a/src/views/Challenge/index.js b/src/views/Challenge/index.js
index 11f91d26..4ba85945 100644
--- a/src/views/Challenge/index.js
+++ b/src/views/Challenge/index.js
@@ -257,6 +257,7 @@ export default function Challenge(params) {
         saveAnswer()
         // 提交答题次数给后端
         setLoading(true);
+        delete answers.annotation;
         await submitChallenge({
             token_id: detail.tokenId,
             answer: JSON.stringify(answers),