diff --git a/app/Http/Controllers/Mobile/CourseController.php b/app/Http/Controllers/Mobile/CourseController.php
index 65ab4ce..baa9074 100755
--- a/app/Http/Controllers/Mobile/CourseController.php
+++ b/app/Http/Controllers/Mobile/CourseController.php
@@ -528,6 +528,13 @@ class CourseController extends CommonController
         if (date('Y-m-d') != $courseContent->date) {
             return $this->fail([ResponseCode::ERROR_BUSINESS, '不在签到时间']);
         }
+        // 不能重复签到
+        $courseContentCheck = CourseContentCheck::where('course_content_id', $all['course_content_id'])
+            ->where('user_id', $this->getUserId())
+            ->first();
+        if ($courseContentCheck) {
+            return $this->fail([ResponseCode::ERROR_BUSINESS, '不能重复签到']);
+        }
         CourseContentCheck::create([
             'course_content_id' => $all['course_content_id'],
             'user_id' => $this->getUserId(),