diff --git a/docs/MatrixOne/Reference/Operators/operators/logical-operators/not.md b/docs/MatrixOne/Reference/Operators/operators/logical-operators/not.md
index 4e0b623b84..98a8aa4d78 100644
--- a/docs/MatrixOne/Reference/Operators/operators/logical-operators/not.md
+++ b/docs/MatrixOne/Reference/Operators/operators/logical-operators/not.md
@@ -2,12 +2,12 @@
 
 ## **运算符说明**
 
-`NOT,!` 逻辑运算符用作于*逻辑非*运算。如果操作数为零，则返回结果为 `true`；如果操作数非零，则返回结果为 `false`；若果操作数为 `NOT NUL` 则返回 `NULL`。
+`NOT,!` 逻辑运算符用作于*逻辑非*运算。如果操作数为零，则返回结果为 `true`；如果操作数非零，则返回结果为 `false`；如果操作数为 `NOT NUL` 则返回 `NULL`。
 
 ## **语法结构**
 
 ```
-> SELECT not column_name FROM table_name;
+> NOT|! value
 ```
 
 ## **示例**
@@ -20,16 +20,18 @@ mysql> select not 0;
 | true  |
 +-------+
 1 row in set (0.02 sec)
-mysql> select not null;
-+----------+
-| not null |
-+----------+
-| NULL     |
-+----------+
+
+mysql> select ! null;
++-------+
+| !null |
++-------+
+| NULL  |
++-------+
 1 row in set (0.00 sec)
-mysql> select not 1;
+
+mysql> select ! 1;
 +-------+
-| not 1 |
+| !1    |
 +-------+
 | false |
 +-------+
@@ -39,6 +41,17 @@ mysql> select not 1;
 ```sql
 create table t1 (a boolean,b bool);
 insert into t1 values (0,1),(true,false),(true,1),(0,false),(NULL,NULL);
+mysql> SELECT * FROM T1;
++-------+-------+
+| a     | b     |
++-------+-------+
+| false | true  |
+| true  | false |
+| true  | true  |
+| false | false |
+| NULL  | NULL  |
++-------+-------+
+5 rows in set (0.01 sec)
 
 mysql> select not a and not b from t1;
 +-----------------+
@@ -51,8 +64,13 @@ mysql> select not a and not b from t1;
 | NULL            |
 +-----------------+
 5 rows in set (0.00 sec)
-```
 
-## **限制**
-
-MatrixOne 暂时还不支持 `!` 运算符。
+mysql> select * from t1 where !(a=false);
++------+-------+
+| a    | b     |
++------+-------+
+| true | false |
+| true | true  |
++------+-------+
+2 rows in set (0.00 sec)
+```