diff --git a/.changelog/3078.txt b/.changelog/3078.txt
new file mode 100644
index 0000000000..d4878d4156
--- /dev/null
+++ b/.changelog/3078.txt
@@ -0,0 +1,3 @@
+```release-note:enhancement
+datasource/tencentcloud_cbs_snapshots: update code
+```
diff --git a/tencentcloud/services/cbs/data_source_tc_cbs_snapshots.go b/tencentcloud/services/cbs/data_source_tc_cbs_snapshots.go
index e8caa23fe1..cf4af97394 100644
--- a/tencentcloud/services/cbs/data_source_tc_cbs_snapshots.go
+++ b/tencentcloud/services/cbs/data_source_tc_cbs_snapshots.go
@@ -36,10 +36,10 @@ func DataSourceTencentCloudCbsSnapshots() *schema.Resource {
 				Type:         schema.TypeString,
 				Optional:     true,
 				ValidateFunc: tccommon.ValidateAllowedStringValue(CBS_STORAGE_USAGE),
-				Description:  "Types of CBS which this snapshot created from, and available values include SYSTEM_DISK and DATA_DISK.",
+				Description:  "Types of CBS which this snapshot created from, and available values include `SYSTEM_DISK` and `DATA_DISK`.",
 			},
 			"project_id": {
-				Type:        schema.TypeInt,
+				Type:        schema.TypeString,
 				Optional:    true,
 				Description: "ID of the project within the snapshot.",
 			},
@@ -119,38 +119,43 @@ func DataSourceTencentCloudCbsSnapshots() *schema.Resource {
 func dataSourceTencentCloudCbsSnapshotsRead(d *schema.ResourceData, meta interface{}) error {
 	defer tccommon.LogElapsed("data_source.tencentcloud_cbs_snapshots.read")()
 
-	logId := tccommon.GetLogId(tccommon.ContextNil)
-	ctx := context.WithValue(context.TODO(), tccommon.LogIdKey, logId)
+	var (
+		logId      = tccommon.GetLogId(tccommon.ContextNil)
+		ctx        = context.WithValue(context.TODO(), tccommon.LogIdKey, logId)
+		cbsService = CbsService{client: meta.(tccommon.ProviderMeta).GetAPIV3Conn()}
+	)
 
 	params := make(map[string]string)
 	if v, ok := d.GetOk("snapshot_id"); ok {
 		params["snapshot-id"] = v.(string)
 	}
+
 	if v, ok := d.GetOk("snapshot_name"); ok {
 		params["snapshot-name"] = v.(string)
 	}
+
 	if v, ok := d.GetOk("storage_id"); ok {
 		params["disk-id"] = v.(string)
 	}
+
 	if v, ok := d.GetOk("storage_usage"); ok {
 		params["disk-usage"] = v.(string)
 	}
-	if v, ok := d.GetOkExists("project_id"); ok {
+
+	if v, ok := d.GetOk("project_id"); ok {
 		params["project-id"] = v.(string)
 	}
+
 	if v, ok := d.GetOk("availability_zone"); ok {
 		params["zone"] = v.(string)
 	}
 
-	cbsService := CbsService{
-		client: meta.(tccommon.ProviderMeta).GetAPIV3Conn(),
-	}
-
 	err := resource.Retry(tccommon.ReadRetryTimeout, func() *resource.RetryError {
 		snapshots, e := cbsService.DescribeSnapshotsByFilter(ctx, params)
 		if e != nil {
 			return tccommon.RetryError(e)
 		}
+
 		ids := make([]string, 0, len(snapshots))
 		snapshotList := make([]map[string]interface{}, 0, len(snapshots))
 		for _, snapshot := range snapshots {
@@ -166,6 +171,7 @@ func dataSourceTencentCloudCbsSnapshotsRead(d *schema.ResourceData, meta interfa
 				"create_time":       *snapshot.CreateTime,
 				"encrypt":           *snapshot.Encrypt,
 			}
+
 			snapshotList = append(snapshotList, mapping)
 			ids = append(ids, *snapshot.SnapshotId)
 		}
@@ -185,6 +191,7 @@ func dataSourceTencentCloudCbsSnapshotsRead(d *schema.ResourceData, meta interfa
 
 		return nil
 	})
+
 	if err != nil {
 		log.Printf("[CRITAL]%s read cbs snapshots failed, reason:%s\n ", logId, err.Error())
 		return err
diff --git a/tencentcloud/services/cbs/data_source_tc_cbs_snapshots.md b/tencentcloud/services/cbs/data_source_tc_cbs_snapshots.md
index 3196d6e0b8..fff91c9936 100644
--- a/tencentcloud/services/cbs/data_source_tc_cbs_snapshots.md
+++ b/tencentcloud/services/cbs/data_source_tc_cbs_snapshots.md
@@ -2,9 +2,37 @@ Use this data source to query detailed information of CBS snapshots.
 
 Example Usage
 
+Query all snapshots
+
 ```hcl
+data "tencentcloud_cbs_snapshots" "snapshots" {}
+```
+
+Query snapshots by filters
+
+```hcl
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  snapshot_id        = "snap-hibh08s3"
+  result_output_file = "my_snapshots"
+}
+
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  snapshot_name = "tf-example"
+}
+
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  storage_id = "disk-12j0fk1w"
+}
+
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  storage_usage = "SYSTEM_DISK"
+}
+
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  project_id = "0"
+}
+
 data "tencentcloud_cbs_snapshots" "snapshots" {
-  snapshot_id        = "snap-f3io7adt"
-  result_output_file = "mytestpath"
+  availability_zone = "ap-guangzhou-4"
 }
 ```
\ No newline at end of file
diff --git a/website/docs/d/cbs_snapshots.html.markdown b/website/docs/d/cbs_snapshots.html.markdown
index d8b84f59ba..81b0891c8c 100644
--- a/website/docs/d/cbs_snapshots.html.markdown
+++ b/website/docs/d/cbs_snapshots.html.markdown
@@ -13,10 +13,38 @@ Use this data source to query detailed information of CBS snapshots.
 
 ## Example Usage
 
+### Query all snapshots
+
+```hcl
+data "tencentcloud_cbs_snapshots" "snapshots" {}
+```
+
+### Query snapshots by filters
+
 ```hcl
 data "tencentcloud_cbs_snapshots" "snapshots" {
-  snapshot_id        = "snap-f3io7adt"
-  result_output_file = "mytestpath"
+  snapshot_id        = "snap-hibh08s3"
+  result_output_file = "my_snapshots"
+}
+
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  snapshot_name = "tf-example"
+}
+
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  storage_id = "disk-12j0fk1w"
+}
+
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  storage_usage = "SYSTEM_DISK"
+}
+
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  project_id = "0"
+}
+
+data "tencentcloud_cbs_snapshots" "snapshots" {
+  availability_zone = "ap-guangzhou-4"
 }
 ```
 
@@ -25,12 +53,12 @@ data "tencentcloud_cbs_snapshots" "snapshots" {
 The following arguments are supported:
 
 * `availability_zone` - (Optional, String) The available zone that the CBS instance locates at.
-* `project_id` - (Optional, Int) ID of the project within the snapshot.
+* `project_id` - (Optional, String) ID of the project within the snapshot.
 * `result_output_file` - (Optional, String) Used to save results.
 * `snapshot_id` - (Optional, String) ID of the snapshot to be queried.
 * `snapshot_name` - (Optional, String) Name of the snapshot to be queried.
 * `storage_id` - (Optional, String) ID of the the CBS which this snapshot created from.
-* `storage_usage` - (Optional, String) Types of CBS which this snapshot created from, and available values include SYSTEM_DISK and DATA_DISK.
+* `storage_usage` - (Optional, String) Types of CBS which this snapshot created from, and available values include `SYSTEM_DISK` and `DATA_DISK`.
 
 ## Attributes Reference