diff --git a/src/gausskernel/security/keymgr/encrypt/security_sm2_enc_key.cpp b/src/gausskernel/security/keymgr/encrypt/security_sm2_enc_key.cpp
index 01e9b59c90f2cadc19866d66e07b2ae58558936f..8c41809fafefc274170d79b34f7df7b1301c31bc 100644
--- a/src/gausskernel/security/keymgr/encrypt/security_sm2_enc_key.cpp
+++ b/src/gausskernel/security/keymgr/encrypt/security_sm2_enc_key.cpp
@@ -46,7 +46,7 @@ Sm2KeyPair* generate_encrypt_pair_key()
         return NULL;
     }
 
-    EC_GROUP *encrypted_group = EC_GROUP_new_by_curve_name(NID_brainpoolP256r1);
+    EC_GROUP *encrypted_group = EC_GROUP_new_by_curve_name(NID_sm2);
     if (encrypted_group == NULL) {
         EC_KEY_free(encrypted_key);
         return NULL;