diff --git a/Dao/MyBatis/Maps/CM.xml b/Dao/MyBatis/Maps/CM.xml
index 1de780c..c6ff23d 100644
--- a/Dao/MyBatis/Maps/CM.xml
+++ b/Dao/MyBatis/Maps/CM.xml
@@ -1250,7 +1250,10 @@
         <update id="cm.cmmenu.up" parameterClass="hashtable">
             update cmmenu set <include refid="sql.up"></include>,isplan=#isplan#,iscontent=#iscontent#,isev=#isev#,isrs=#isrs#,isgrade=#isgrade#
             where cmno=#cmno#;
-            
+            <isEmpty property="bmnos">
+            delete from cmmenubm where cmno=#cmno#;
+            </isEmpty>
+            <isNotEmpty property="bmnos">            
             delete from cmmenubm where cmno=#cmno# and bmno not in ($bmnos$);
             
             insert into cmmenubm (cmno,bmno,<include refid="sql.inc"></include>)
@@ -1258,6 +1261,7 @@
             from boardmaster a
             left outer join cmmenubm b on b.cmno=#cmno# and b.bmno=a.bmno
             where a.bmno in ($bmnos$) and b.bmno is null;
+            </isNotEmpty>
         </update>
 
         <select id="cm.cminfile" parameterClass="int" resultClass="data">