diff --git a/packages/examination/src/views/exam-online/compoents/ExamListPage.tsx b/packages/examination/src/views/exam-online/compoents/ExamListPage.tsx
index d09bd4c..c710931 100644
--- a/packages/examination/src/views/exam-online/compoents/ExamListPage.tsx
+++ b/packages/examination/src/views/exam-online/compoents/ExamListPage.tsx
@@ -411,6 +411,7 @@ const ExamListPage = ({ history }: { history: any }) => {
                         onChange={(value: Moment | null) =>
                             setSearchForm({...searchForm, validTime: value})
                         }
+                        style={{width: 240}}
                     />
                 </Form.Item>
                 <Form.Item>