diff --git a/src/views/publish/examRule/draft/examFrom.vue b/src/views/publish/examRule/draft/examFrom.vue
index 3aef4c25c..5528e74b7 100644
--- a/src/views/publish/examRule/draft/examFrom.vue
+++ b/src/views/publish/examRule/draft/examFrom.vue
@@ -231,8 +231,12 @@ export default {
         submitForm() {
             this.$refs['form'].validate((valid) => {
                 if (valid) {
-                    this.form.startDate = this.getDate(this.form.startDate);
-                    this.form.endDate = this.getDate(this.form.endDate);
+                    if (this.form.startDate) {
+                        this.form.startDate = this.getDate(this.form.startDate);
+                    }
+                    if (this.form.endDate) {
+                        this.form.endDate = this.getDate(this.form.endDate);
+                    }
                     this.form['trial'] = this.trial;
                     this.$store.dispatch('exam/setCourseDetail', this.form);
                     this.$emit('definition', this.form);