diff --git a/openstack/rds/v3/backups/requests.go b/openstack/rds/v3/backups/requests.go
new file mode 100644
index 000000000..bf37ea7b0
--- /dev/null
+++ b/openstack/rds/v3/backups/requests.go
@@ -0,0 +1,43 @@
+package backups
+
+import (
+	"github.com/huaweicloud/golangsdk"
+)
+
+var RequestOpts golangsdk.RequestOpts = golangsdk.RequestOpts{
+	MoreHeaders: map[string]string{"Content-Type": "application/json", "X-Language": "en-us"},
+}
+
+// UpdateOptsBuilder allows extensions to add additional parameters to the
+// Update request.
+type UpdateOptsBuilder interface {
+	ToBackupUpdateMap() (map[string]interface{}, error)
+}
+
+// UpdateOpts contains all the values needed to update a Backup.
+type UpdateOpts struct {
+	//Keep Days
+	KeepDays *int `json:"keep_days" required:"true"`
+	//Start Time
+	StartTime string `json:"start_time,omitempty"`
+	//Period
+	Period string `json:"period,omitempty"`
+}
+
+// ToBackupUpdateMap builds a update request body from UpdateOpts.
+func (opts UpdateOpts) ToBackupUpdateMap() (map[string]interface{}, error) {
+	return golangsdk.BuildRequestBody(opts, "backup_policy")
+}
+
+// Update accepts a UpdateOpts struct and uses the values to update a Backup.The response code from api is 200
+func Update(c *golangsdk.ServiceClient, id string, opts UpdateOptsBuilder) (r UpdateResult) {
+	b, err := opts.ToBackupUpdateMap()
+	if err != nil {
+		r.Err = err
+		return
+	}
+	reqOpt := &golangsdk.RequestOpts{OkCodes: []int{200},
+		MoreHeaders: RequestOpts.MoreHeaders}
+	_, r.Err = c.Put(resourceURL(c, id), b, nil, reqOpt)
+	return
+}
diff --git a/openstack/rds/v3/backups/results.go b/openstack/rds/v3/backups/results.go
new file mode 100644
index 000000000..1e9382f8a
--- /dev/null
+++ b/openstack/rds/v3/backups/results.go
@@ -0,0 +1,10 @@
+package backups
+
+import (
+	"github.com/huaweicloud/golangsdk"
+)
+
+// UpdateResult represents the result of a update operation.
+type UpdateResult struct {
+	golangsdk.ErrResult
+}
diff --git a/openstack/rds/v3/backups/urls.go b/openstack/rds/v3/backups/urls.go
new file mode 100644
index 000000000..bed6f5912
--- /dev/null
+++ b/openstack/rds/v3/backups/urls.go
@@ -0,0 +1,7 @@
+package backups
+
+import "github.com/huaweicloud/golangsdk"
+
+func resourceURL(c *golangsdk.ServiceClient, id string) string {
+	return c.ServiceURL("instances", id, "backups/policy")
+}