diff --git a/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js b/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js
index c710d4b8c..32d92e22c 100644
--- a/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js
+++ b/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js
@@ -323,7 +323,7 @@ class Challenges extends Component {
 							</Tooltip>
             </p>
 
-            <div className="justify break_full_word new_li markdown-body"
+            <div className="justify break_full_word new_li "
                  id="challenge_editorMd_description">
               <p id="ReactMarkdown" style={{overflow:'hidden'}}>
                 {ChallengesDataList === undefined ? "" :ChallengesDataList&&ChallengesDataList.description===null?"":