diff --git a/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/mapper/SysCatalogTextbookMapper.java b/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/mapper/SysCatalogTextbookMapper.java
index b98204a..6deb2da 100644
--- a/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/mapper/SysCatalogTextbookMapper.java
+++ b/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/mapper/SysCatalogTextbookMapper.java
@@ -23,7 +23,7 @@ public interface SysCatalogTextbookMapper extends BaseMapperPlus<SysCatalogTextb
 
     int addOrderNum(@Param("mix") Long mix, @Param("max") Long max);
 
-    int subOrderNum(@Param("mix") Long mix,  @Param("max")  Long max);
+    int subOrderNum(@Param("mix") Long mix, @Param("max") Long max);
 
 
 }
diff --git a/ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysCatalogTextbookMapper.xml b/ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysCatalogTextbookMapper.xml
index 4d5976f..41f2b4a 100644
--- a/ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysCatalogTextbookMapper.xml
+++ b/ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysCatalogTextbookMapper.xml
@@ -27,7 +27,7 @@
                 order_num &gt; #{mix}
             </if>
             <if test="max != null">
-                and order_num &lt; #{mix}
+                and order_num &lt; #{max}
             </if>
         </where>
     </update>
@@ -40,7 +40,7 @@
                 order_num &gt; #{mix}
             </if>
             <if test="max != null">
-                and order_num &lt; #{mix}
+                and order_num &lt; #{max}
             </if>
         </where>
     </update>