diff --git a/docs/en/14-reference/12-config/index.md b/docs/en/14-reference/12-config/index.md
index cbff7301d2d1658184d0d5614c2b522b7e4ce91c..7522744469caa994d097a5d01f94f30c56b1cf20 100755
--- a/docs/en/14-reference/12-config/index.md
+++ b/docs/en/14-reference/12-config/index.md
@@ -102,7 +102,7 @@ Ensure that your firewall rules do not block TCP port 6042  on any host in the c
 | Value Range   | 10-50000000                                          |
 | Default Value | 5000                                                 |
 
-### numOfRpcSessions 
+### numOfRpcSessions
 
 | Attribute     | Description                                |
 | ------------- | ------------------------------------------ |
@@ -202,7 +202,7 @@ Please note the `taoskeeper` needs to be installed and running to create the `lo
 | Default Value | 0                                                                                                                                                                   |
 | Notes         | 0: Disable SMA indexing and perform all queries on non-indexed data; 1: Enable SMA indexing and perform queries from suitable statements on precomputation results. |
 
-### countAlwaysReturnValue 
+### countAlwaysReturnValue
 
 | Attribute  | Description                                                                                                                                                                                                                     |
 | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
@@ -713,6 +713,14 @@ The charset that takes effect is UTF-8.
 | Value Range   | 0: disable UDF; 1: enabled UDF     |
 | Default Value | 1                                  |
 
+### ttlChangeOnWrite
+
+| Attribute     | Description                                                                   |
+| ------------- | ----------------------------------------------------------------------------- |
+| Applicable    | Server Only                                                                   |
+| Meaning       | Whether the ttl expiration time changes with the table modification operation |
+| Value Range   | 0: not change; 1: change by modification                                      |
+| Default Value | 0                                                                             |
 
 ## 3.0 Parameters
 
@@ -770,3 +778,4 @@ The charset that takes effect is UTF-8.
 | 52  |        charset         | Yes                    | Yes                          |                         |
 | 53  |          udf           | Yes                    | Yes                          |                         |
 | 54  |     enableCoreFile     | Yes                    | Yes                          |                         |
+| 55  |    ttlChangeOnWrite    | No                     | Yes                          |                         |
diff --git a/docs/zh/14-reference/12-config/index.md b/docs/zh/14-reference/12-config/index.md
index a637b52bf852f4126d7711c206cd402945be0d78..d57ee0286882a87013ddb6203098105a10d31e58 100755
--- a/docs/zh/14-reference/12-config/index.md
+++ b/docs/zh/14-reference/12-config/index.md
@@ -101,7 +101,7 @@ taos -C
 | 取值范围 | 10-50000000             |
 | 缺省值  | 5000                    |
 
-### numOfRpcSessions 
+### numOfRpcSessions
 
 | 属性     | 说明                    |
 | --------| ---------------------- |
@@ -120,7 +120,7 @@ taos -C
 | 缺省值   | 500000               |
 
 
-### numOfRpcSessions 
+### numOfRpcSessions
 
 | 属性     | 说明                         |
 | -------- | ---------------------------- |
@@ -717,6 +717,15 @@ charset 的有效值是 UTF-8。
 | 取值范围 | 0: 不启动；1：启动 |
 | 缺省值   | 1                  |
 
+### ttlChangeOnWrite
+
+| 属性     | 说明               |
+| -------- | ------------------ |
+| 适用范围 | 仅服务端适用       |
+| 含义     | ttl 到期时间是否伴随表的修改操作改变  |
+| 取值范围 | 0: 不改变；1：改变 |
+| 缺省值   | 0                  |
+
 ## 压缩参数
 
 ### compressMsgSize
@@ -784,6 +793,7 @@ charset 的有效值是 UTF-8。
 | 52  |        charset         | 是              | 是                              |                    |
 | 53  |          udf           | 是              | 是                              |                    |
 | 54  |     enableCoreFile     | 是              | 是                              |                    |
+| 55  |    ttlChangeOnWrite    | 否              | 是                              |                    |
 
 ## 2.x->3.0 的废弃参数