diff --git a/src/sm2_key_share.h b/src/sm2_key_share.h
deleted file mode 100644
index ef4b1582..00000000
--- a/src/sm2_key_share.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- *  Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
- *
- *  Licensed under the Apache License, Version 2.0 (the License); you may
- *  not use this file except in compliance with the License.
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <gmssl/sm2.h>
-#include <gmssl/mem.h>
-#include <gmssl/error.h>
-
-
-typedef struct {
-	SM2_KEY key;
-	size_t index;
-	size_t total_cnt;
-} SM2_KEY_SHARE;
-
-int sm2_key_split(const SM2_KEY *key, size_t recover_cnt, size_t total_cnt, SM2_KEY_SHARE *shares)
-int sm2_key_recover(SM2_KEY *key, const SM2_KEY_SHARE *shares, size_t shares_cnt)
-int sm2_key_share_encrypt_to_file(const SM2_KEY_SHARE *share, const char *pass, const char *path_prefix)
-int sm2_key_share_decrypt_from_file(SM2_KEY_SHARE *share, const char *pass, const char *file)
-int sm2_key_share_print(FILE *fp, int fmt, int ind, const char *label, const SM2_KEY_SHARE *share)