diff --git a/tencentcloud/data_source_tc_redis_instances_test.go b/tencentcloud/data_source_tc_redis_instances_test.go
index e02bc34219..ee18b83349 100644
--- a/tencentcloud/data_source_tc_redis_instances_test.go
+++ b/tencentcloud/data_source_tc_redis_instances_test.go
@@ -54,7 +54,6 @@ resource "tencentcloud_redis_instance" "redis_instance_test" {
   mem_size          = 8192
   name              = "terraform_test"
   port              = 6379
-
   tags = {
     "test" = "test"
   }
diff --git a/tencentcloud/resource_tc_redis_instance.go b/tencentcloud/resource_tc_redis_instance.go
index 4370291a92..e1308c6f8c 100644
--- a/tencentcloud/resource_tc_redis_instance.go
+++ b/tencentcloud/resource_tc_redis_instance.go
@@ -117,9 +117,8 @@ func resourceTencentCloudRedisInstance() *schema.Resource {
 			"redis_shard_num": {
 				Type:        schema.TypeInt,
 				Optional:    true,
-				ForceNew:    true,
-				Default:     1,
-				Description: "The number of instance shard. This is not required for standalone and master slave versions.",
+				Computed:    true,
+				Description: "The number of instance shard, default is 1. This is not required for standalone and master slave versions.",
 			},
 			"redis_replicas_num": {
 				Type:        schema.TypeInt,
@@ -283,7 +282,10 @@ func resourceTencentCloudRedisInstanceCreate(d *schema.ResourceData, meta interf
 	redisName := d.Get("name").(string)
 	redisType := d.Get("type").(string)
 	typeId := int64(d.Get("type_id").(int))
-	redisShardNum := d.Get("redis_shard_num").(int)
+	var redisShardNum int = 1
+	if v, ok := d.GetOk("redis_shard_num"); ok {
+		redisShardNum = v.(int)
+	}
 	redisReplicasNum := d.Get("redis_replicas_num").(int)
 	password := d.Get("password").(string)
 	noAuth := d.Get("no_auth").(bool)
diff --git a/tencentcloud/resource_tc_redis_instance_test.go b/tencentcloud/resource_tc_redis_instance_test.go
index b654cb45bf..52f3c5c32f 100644
--- a/tencentcloud/resource_tc_redis_instance_test.go
+++ b/tencentcloud/resource_tc_redis_instance_test.go
@@ -266,6 +266,30 @@ func TestAccTencentCloudRedisInstance_Maz(t *testing.T) {
 	})
 }
 
+func TestAccTencentCloudRedisInstance_Cluster(t *testing.T) {
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccTencentCloudRedisInstanceDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccRedisInstanceCluster(),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccTencentCloudRedisInstanceExists("tencentcloud_redis_instance.redis_cluster"),
+					resource.TestCheckResourceAttr("tencentcloud_redis_instance.redis_cluster", "redis_shard_num", "1"),
+				),
+			},
+			{
+				Config: testAccRedisInstanceClusterUpdateShard(),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccTencentCloudRedisInstanceExists("tencentcloud_redis_instance.redis_cluster"),
+					resource.TestCheckResourceAttr("tencentcloud_redis_instance.redis_cluster", "redis_shard_num", "3"),
+				),
+			},
+		},
+	})
+}
+
 func TestAccTencentCloudRedisInstance_Prepaid(t *testing.T) {
 	resource.Test(t, resource.TestCase{
 		PreCheck:     func() { testAccPreCheckCommon(t, ACCOUNT_TYPE_PREPAY) },
@@ -488,6 +512,40 @@ resource "tencentcloud_redis_instance" "redis_maz" {
 }`
 }
 
+func testAccRedisInstanceCluster() string {
+	return defaultVpcVariable + `
+resource "tencentcloud_redis_instance" "redis_cluster" {
+  availability_zone = "ap-guangzhou-3"
+  type_id            = 7
+  password           = "AAA123456BBB"
+  mem_size           = 4096
+  name               = "terraform_cluster"
+  port               = 6379
+  redis_shard_num    = 1
+  redis_replicas_num = 2
+  replica_zone_ids   = [100003, 100004]
+  vpc_id 			 = var.vpc_id
+  subnet_id			 = var.subnet_id
+}`
+}
+
+func testAccRedisInstanceClusterUpdateShard() string {
+	return defaultVpcVariable + `
+resource "tencentcloud_redis_instance" "redis_cluster" {
+  availability_zone = "ap-guangzhou-3"
+  type_id            = 7
+  password           = "AAA123456BBB"
+  mem_size           = 4096
+  name               = "terraform_cluster"
+  port               = 6379
+  redis_shard_num    = 3
+  redis_replicas_num = 2
+  replica_zone_ids   = [100003, 100004]
+  vpc_id 			 = var.vpc_id
+  subnet_id			 = var.subnet_id
+}`
+}
+
 func testAccRedisInstancePrepaidBasic() string {
 	return `
 resource "tencentcloud_redis_instance" "redis_prepaid_instance_test" {
diff --git a/website/docs/r/redis_instance.html.markdown b/website/docs/r/redis_instance.html.markdown
index 1814ebee34..40db4946a8 100644
--- a/website/docs/r/redis_instance.html.markdown
+++ b/website/docs/r/redis_instance.html.markdown
@@ -79,7 +79,7 @@ The following arguments are supported:
 * `prepaid_period` - (Optional) The tenancy (time unit is month) of the prepaid instance, NOTE: it only works when charge_type is set to `PREPAID`. Valid values are `1`, `2`, `3`, `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11`, `12`, `24`, `36`.
 * `project_id` - (Optional) Specifies which project the instance should belong to.
 * `redis_replicas_num` - (Optional) The number of instance copies. This is not required for standalone and master slave versions.
-* `redis_shard_num` - (Optional, ForceNew) The number of instance shard. This is not required for standalone and master slave versions.
+* `redis_shard_num` - (Optional) The number of instance shard, default is 1. This is not required for standalone and master slave versions.
 * `replica_zone_ids` - (Optional) ID of replica nodes available zone. This is not required for standalone and master slave versions.
 * `replicas_read_only` - (Optional, ForceNew) Whether copy read-only is supported, Redis 2.8 Standard Edition and CKV Standard Edition do not support replica read-only, turn on replica read-only, the instance will automatically read and write separate, write requests are routed to the primary node, read requests are routed to the replica node, if you need to open replica read-only, the recommended number of replicas >=2.
 * `security_groups` - (Optional, ForceNew) ID of security group. If both vpc_id and subnet_id are not set, this argument should not be set either.