diff --git a/public/react/src/modules/courses/new/CoursesNew.js b/public/react/src/modules/courses/new/CoursesNew.js
index 4ab7112d7..47170a722 100644
--- a/public/react/src/modules/courses/new/CoursesNew.js
+++ b/public/react/src/modules/courses/new/CoursesNew.js
@@ -412,7 +412,7 @@ class CoursesNew extends Component {
                                         })(
                                             <Select
                                             showSearch
-                                            className={"fl construction mr10 "}
+                                            className={"fl construction "}
                                             placeholder="例如：数据结构"
                                             // value={this.state.course}
                                             onSearch={this.handleSearch}