diff --git a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/CourseFacade.java b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/CourseFacade.java
index 5ddeb62..a45d3a3 100644
--- a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/CourseFacade.java
+++ b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/facade/CourseFacade.java
@@ -722,7 +722,7 @@ public class CourseFacade {
             CourseTypeModel courseTypeModel = courseTypeModels.get(0);
             courseTypeModel.setScore(courseTypeModel.getScore() == null ? 0 : (courseTypeModel.getScore()+model.getCourseTypeSocre()));
             courseTypeModel.setNumbers(courseTypeModel.getNumbers() == null ? 0 : (courseTypeModel.getNumbers() + 1));
-            courseTypeModel.setAvg(courseTypeModel.getNumbers() / courseTypeModel.getScore());
+            courseTypeModel.setAvg(courseTypeModel.getScore() == 0 ? null : courseTypeModel.getNumbers() / courseTypeModel.getScore());
             courseTypeService.updateCourseType(courseTypeModel);
         }
     }