diff --git a/.changelog/3261.txt b/.changelog/3261.txt
new file mode 100644
index 0000000000..b35a808f6b
--- /dev/null
+++ b/.changelog/3261.txt
@@ -0,0 +1,3 @@
+```release-note:enhancement
+resource/tencentcloud_clb_instance_sla_config: update doc
+```
\ No newline at end of file
diff --git a/tencentcloud/services/clb/resource_tc_clb_instance_sla_config.go b/tencentcloud/services/clb/resource_tc_clb_instance_sla_config.go
index f9aca47ce0..fc5410f4f0 100644
--- a/tencentcloud/services/clb/resource_tc_clb_instance_sla_config.go
+++ b/tencentcloud/services/clb/resource_tc_clb_instance_sla_config.go
@@ -35,7 +35,7 @@ func ResourceTencentCloudClbInstanceSlaConfig() *schema.Resource {
 					"`SLA`: Super Large 4. When you have activated Super Large models, `SLA` refers to Super Large 4; " +
 					"`clb.c2.medium`: Standard; " +
 					"`clb.c3.small`: Advanced 1; " +
-					"`clb.c3.medium`: Advanced 1; " +
+					"`clb.c3.medium`: Advanced 2; " +
 					"`clb.c4.small`: Super Large 1; " +
 					"`clb.c4.medium`: Super Large 2; " +
 					"`clb.c4.large`: Super Large 3; " +
diff --git a/website/docs/r/clb_instance_sla_config.html.markdown b/website/docs/r/clb_instance_sla_config.html.markdown
index f57fe41f6e..68f4d5bb94 100644
--- a/website/docs/r/clb_instance_sla_config.html.markdown
+++ b/website/docs/r/clb_instance_sla_config.html.markdown
@@ -25,7 +25,7 @@ resource "tencentcloud_clb_instance_sla_config" "instance_sla_config" {
 The following arguments are supported:
 
 * `load_balancer_id` - (Required, String) ID of the CLB instance.
-* `sla_type` - (Required, String) This parameter is required to create LCU-supported instances. Values:`SLA`: Super Large 4. When you have activated Super Large models, `SLA` refers to Super Large 4; `clb.c2.medium`: Standard; `clb.c3.small`: Advanced 1; `clb.c3.medium`: Advanced 1; `clb.c4.small`: Super Large 1; `clb.c4.medium`: Super Large 2; `clb.c4.large`: Super Large 3; `clb.c4.xlarge`: Super Large 4. For more details, see [Instance Specifications](https://intl.cloud.tencent.com/document/product/214/84689?from_cn_redirect=1).
+* `sla_type` - (Required, String) This parameter is required to create LCU-supported instances. Values:`SLA`: Super Large 4. When you have activated Super Large models, `SLA` refers to Super Large 4; `clb.c2.medium`: Standard; `clb.c3.small`: Advanced 1; `clb.c3.medium`: Advanced 2; `clb.c4.small`: Super Large 1; `clb.c4.medium`: Super Large 2; `clb.c4.large`: Super Large 3; `clb.c4.xlarge`: Super Large 4. For more details, see [Instance Specifications](https://intl.cloud.tencent.com/document/product/214/84689?from_cn_redirect=1).
 
 ## Attributes Reference