diff --git a/api/@ohos.security.cryptoFramework.d.ts b/api/@ohos.security.cryptoFramework.d.ts
index abd516d16d477bdb417b8dbbe68b85b453cbb5e4..45543f6f49e5acdd3aa0fe1dfa681fd87485af72 100644
--- a/api/@ohos.security.cryptoFramework.d.ts
+++ b/api/@ohos.security.cryptoFramework.d.ts
@@ -680,6 +680,7 @@ declare namespace cryptoFramework {
      * Encode the key object to binary data.
      * The key can be a symmetric key, public key, or private key. The public key must be in DER encoding format and comply with the ASN.1 syntax and X.509 specifications.
      * The private key must be in DER encoding format and comply with the ASN.1 syntax and PKCS#8 specifications.
+     *
      * @returns { DataBlob } the binary data of the key object.
      * @throws { BusinessError } 801 - this operation is not supported.
      * @throws { BusinessError } 17620001 - memory operation failed.