....

src/modules/examwork/view/student.vue

@@ -384,10 +384,13 @@
             </el-form>
           </el-dialog>
 
-          <el-dialog title="照片" :visible.sync="photoDialog">
-            <div class="student_photo">
-              <img :src="photo.url" alt="学生照片" height="20%" width="30%" />
-            </div>
+          <el-dialog
+            title="照片"
+            :visible.sync="photoDialog"
+            width="300px"
+            center="true"
+          >
+            <img :src="photo.url" alt="学生照片" height="100%" width="100%" />
           </el-dialog>
         </div>
       </div>