diff --git a/mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/conditions/AbstractWrapper.java b/mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/conditions/AbstractWrapper.java
index 2a7b43216b23aa7b13a8d2d5bba9ba7fd8b58344..b022f21b62479db8e9a2d72c37e72d3252635b28 100755
--- a/mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/conditions/AbstractWrapper.java
+++ b/mybatis-plus-core/src/main/java/com/baomidou/mybatisplus/core/conditions/AbstractWrapper.java
@@ -549,12 +549,21 @@ public abstract class AbstractWrapper<T, R, Children extends AbstractWrapper<T,
      */
     protected ISqlSegment inExpression(Collection<?> value) {
         if (CollectionUtils.isEmpty(value)) {
-            return () -> "()";
+            return whenCollectionIsEmpty();
         }
         return () -> value.stream().map(i -> formatParam(null, i))
             .collect(joining(StringPool.COMMA, StringPool.LEFT_BRACKET, StringPool.RIGHT_BRACKET));
     }
 
+    /**
+     * 当in的参数为null或空时的动态sql
+     */
+    private ISqlSegment whenCollectionIsEmpty(){
+        // 为避免出现 "where 字段 in ()" 这样有语法错误的sql，强行弄成"where 字段 in (null)"
+        // 这样虽然也不完美，但是大多数时候还是挺方便的
+        return () -> "(null)";
+    }
+
     /**
      * 获取in表达式 包含括号
      *
@@ -562,7 +571,7 @@ public abstract class AbstractWrapper<T, R, Children extends AbstractWrapper<T,
      */
     protected ISqlSegment inExpression(Object[] values) {
         if (ArrayUtils.isEmpty(values)) {
-            return () -> "()";
+            return whenCollectionIsEmpty();
         }
         return () -> Arrays.stream(values).map(i -> formatParam(null, i))
             .collect(joining(StringPool.COMMA, StringPool.LEFT_BRACKET, StringPool.RIGHT_BRACKET));