diff --git a/.changelog/2779.txt b/.changelog/2779.txt
new file mode 100644
index 0000000000..be048936e2
--- /dev/null
+++ b/.changelog/2779.txt
@@ -0,0 +1,3 @@
+```release-note:enhancement
+resource/tencentcloud_mysql_instance: support mysql `engine_type`.
+```
diff --git a/tencentcloud/services/cdb/resource_tc_mysql_instance.go b/tencentcloud/services/cdb/resource_tc_mysql_instance.go
index 4516d39915..c8126d19e4 100644
--- a/tencentcloud/services/cdb/resource_tc_mysql_instance.go
+++ b/tencentcloud/services/cdb/resource_tc_mysql_instance.go
@@ -226,6 +226,12 @@ func ResourceTencentCloudMysqlInstance() *schema.Resource {
 			Default:      MYSQL_SUPPORTS_ENGINE[len(MYSQL_SUPPORTS_ENGINE)-2],
 			Description:  "The version number of the database engine to use. Supported versions include 5.5/5.6/5.7/8.0, and default is 5.7. Upgrade the instance engine version to support 5.6/5.7 and switch immediately.",
 		},
+		"engine_type": {
+			Type:        schema.TypeString,
+			Optional:    true,
+			Computed:    true,
+			Description: "Instance engine type. The default value is `InnoDB`. Supported values include `InnoDB` and `RocksDB`.",
+		},
 		"upgrade_subversion": {
 			Type:        schema.TypeInt,
 			Optional:    true,
@@ -488,6 +494,16 @@ func mysqlMasterInstanceRoleSet(ctx context.Context, requestInter interface{}, d
 	} else {
 		requestByUse.EngineVersion = &engineVersion
 	}
+
+	if stringInterface, ok := d.GetOk("engine_type"); ok {
+		engineType := stringInterface.(string)
+		if okByMonth {
+			requestByMonth.EngineType = &engineType
+		} else {
+			requestByUse.EngineType = &engineType
+		}
+	}
+
 	if stringInterface, ok := d.GetOk("availability_zone"); ok {
 		str := stringInterface.(string)
 		if okByMonth {
@@ -873,6 +889,9 @@ func resourceTencentCloudMysqlInstanceRead(d *schema.ResourceData, meta interfac
 		}
 		_ = d.Set("project_id", int(*mysqlInfo.ProjectId))
 		_ = d.Set("engine_version", mysqlInfo.EngineVersion)
+		if mysqlInfo.EngineType != nil {
+			_ = d.Set("engine_type", *mysqlInfo.EngineType)
+		}
 		if *mysqlInfo.WanStatus == 1 {
 			_ = d.Set("internet_service", 1)
 			_ = d.Set("internet_host", mysqlInfo.WanDomain)
@@ -1280,6 +1299,10 @@ func mysqlAllInstanceRoleUpdate(ctx context.Context, d *schema.ResourceData, met
 	if d.HasChange("availability_zone") {
 		return fmt.Errorf("argument `availability_zone` cannot be modified for now")
 	}
+
+	if d.HasChange("engine_version") {
+		return fmt.Errorf("argument `engine_version` cannot be modified for now")
+	}
 	return nil
 }
 
diff --git a/tencentcloud/services/cdb/resource_tc_mysql_instance_test.go b/tencentcloud/services/cdb/resource_tc_mysql_instance_test.go
index 588077ab8a..1df502c4b9 100644
--- a/tencentcloud/services/cdb/resource_tc_mysql_instance_test.go
+++ b/tencentcloud/services/cdb/resource_tc_mysql_instance_test.go
@@ -339,6 +339,7 @@ func TestAccTencentCloudMysqlInstanceResource_mysql8(t *testing.T) {
 					resource.TestCheckResourceAttrSet("tencentcloud_mysql_instance.mysql8", "id"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "charge_type", "POSTPAID"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "engine_version", "8.0"),
+					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "engine_type", "InnoDB"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "internet_service", "1"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "slave_deploy_mode", "0"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "first_slave_zone", "ap-guangzhou-4"),
@@ -362,6 +363,7 @@ func TestAccTencentCloudMysqlInstanceResource_mysql8(t *testing.T) {
 					resource.TestCheckResourceAttrSet("tencentcloud_mysql_instance.mysql8", "id"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "charge_type", "POSTPAID"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "engine_version", "8.0"),
+					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "engine_type", "InnoDB"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "internet_service", "1"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "slave_deploy_mode", "0"),
 					resource.TestCheckResourceAttr("tencentcloud_mysql_instance.mysql8", "first_slave_zone", "ap-guangzhou-4"),
@@ -628,9 +630,10 @@ resource "tencentcloud_mysql_instance" "mysql_master" {
 func testAccMysqlMasterInstance_mysql8(value string) string {
 	return fmt.Sprintf(`
 resource "tencentcloud_mysql_instance" "mysql8" {
-	internet_service = 1
-	engine_version   = "8.0"
-	charge_type = "POSTPAID"
+	internet_service  = 1
+	engine_version    = "8.0"
+  	engine_type	      = "InnoDB"
+	charge_type 	  = "POSTPAID"
 	root_password     = "password123"
 	slave_deploy_mode = 0
 	first_slave_zone  = "ap-guangzhou-4"
diff --git a/website/docs/r/mysql_instance.html.markdown b/website/docs/r/mysql_instance.html.markdown
index a8354b9d7b..f6b5646a6a 100644
--- a/website/docs/r/mysql_instance.html.markdown
+++ b/website/docs/r/mysql_instance.html.markdown
@@ -144,6 +144,7 @@ The following arguments are supported:
 * `charge_type` - (Optional, String, ForceNew) Pay type of instance. Valid values:`PREPAID`, `POSTPAID`. Default is `POSTPAID`.
 * `cpu` - (Optional, Int) CPU cores.
 * `device_type` - (Optional, String) Specify device type, available values: `UNIVERSAL` (default), `EXCLUSIVE`, `BASIC`.
+* `engine_type` - (Optional, String) Instance engine type. The default value is `InnoDB`. Supported values include `InnoDB` and `RocksDB`.
 * `engine_version` - (Optional, String) The version number of the database engine to use. Supported versions include 5.5/5.6/5.7/8.0, and default is 5.7. Upgrade the instance engine version to support 5.6/5.7 and switch immediately.
 * `fast_upgrade` - (Optional, Int) Specify whether to enable fast upgrade when upgrade instance spec, available value: `1` - enabled, `0` - disabled.
 * `first_slave_zone` - (Optional, String) Zone information about first slave instance.