diff --git a/web/src/main/java/com/ibeetl/jlw/service/TeacherOpenCourseHandsOnService.java b/web/src/main/java/com/ibeetl/jlw/service/TeacherOpenCourseHandsOnService.java
index 96ea2acd..30e619fa 100644
--- a/web/src/main/java/com/ibeetl/jlw/service/TeacherOpenCourseHandsOnService.java
+++ b/web/src/main/java/com/ibeetl/jlw/service/TeacherOpenCourseHandsOnService.java
@@ -6,6 +6,7 @@ import cn.hutool.core.collection.CollectionUtil;
 import cn.hutool.core.lang.Snowflake;
 import cn.hutool.core.util.NumberUtil;
 import cn.hutool.core.util.ObjectUtil;
+import cn.hutool.core.util.StrUtil;
 import cn.jlw.util.ToolUtils;
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
@@ -176,14 +177,17 @@ public class TeacherOpenCourseHandsOnService extends CoreBaseService<TeacherOpen
                     .stream()
                     .map(i -> i.getTeacherOpenCourseKnowledgePointId().toString()).collect(Collectors.joining(","));
 
-            TeacherOpenCourseKnowledgePointRelationQuery relationQuery = new TeacherOpenCourseKnowledgePointRelationQuery();
-            relationQuery.setOrgId(teacherOpenCourseHandsOn.getOrgId());
-            relationQuery.setUserId(teacherOpenCourseHandsOn.getUserId());
-            relationQuery.setTeacherOpenCourseKnowledgePointIdPlural(collect);
-            relationQuery.setBussinessId(teacherOpenCourseHandsOn.getHandsOnId());
-            relationQuery.setChapterId(teacherOpenCourseHandsOn.getCourseChildNode());
-            relationQuery.setTeacherOpenCourseId(teacherOpenCourseHandsOn.getTeacherOpenCourseId().toString());
-            teacherOpenCourseKnowledgePointRelationService.addBindingKnowledge(relationQuery,true,2);
+
+            if (StrUtil.isNotBlank(collect)) {
+                TeacherOpenCourseKnowledgePointRelationQuery relationQuery = new TeacherOpenCourseKnowledgePointRelationQuery();
+                relationQuery.setOrgId(teacherOpenCourseHandsOn.getOrgId());
+                relationQuery.setUserId(teacherOpenCourseHandsOn.getUserId());
+                relationQuery.setTeacherOpenCourseKnowledgePointIdPlural(collect);
+                relationQuery.setBussinessId(teacherOpenCourseHandsOn.getHandsOnId());
+                relationQuery.setChapterId(teacherOpenCourseHandsOn.getCourseChildNode());
+                relationQuery.setTeacherOpenCourseId(teacherOpenCourseHandsOn.getTeacherOpenCourseId().toString());
+                teacherOpenCourseKnowledgePointRelationService.addBindingKnowledge(relationQuery,true,2);
+            }
         }
         JsonResult jsonResult = new JsonResult();
         jsonResult.setData(teacherOpenCourseHandsOn.getHandsOnId());//自增的ID丢进去