diff --git a/public/react/src/modules/courses/exercise/Studentshavecompletedthelist.js b/public/react/src/modules/courses/exercise/Studentshavecompletedthelist.js
index 3b46b680a..c3d4bf465 100644
--- a/public/react/src/modules/courses/exercise/Studentshavecompletedthelist.js
+++ b/public/react/src/modules/courses/exercise/Studentshavecompletedthelist.js
@@ -1272,7 +1272,11 @@ class Studentshavecompletedthelist extends Component {
 		//被columnsys当作参数接收
 		// console.log("componentDidMount");
 		// console.log(columnsystwo);
+		try {
 			columnsystwo=this.state.columnsys;
+		}catch (e) {
+
+		}
    // console.log(columnsystwo);
 		this.Teacherliststudentlist();