diff --git a/examples/test.rs b/examples/test.rs
index 998f896..5f90f01 100644
--- a/examples/test.rs
+++ b/examples/test.rs
@@ -7,7 +7,7 @@
 use std::ffi::CStr;
 //use rustylib::gen::{CWallet};
 use rustwallet::{
-    fetch_cwallet, free_cwallet, generate_cwallet, save_wallet, sign, CWallet,
+    fetch_cwallet, free_cwallet, generate_cwallet, save_wallet, sign, sss_sign, CWallet,
 };
 
 fn main() {
@@ -24,6 +24,7 @@ fn main() {
         let fetched = fetch_cwallet();
         print_wallet(&fetched);
         sign();
+        sss_sign();
 
         // free_cwallet(wallet); // 对应 generate_cwallet()
         free_cwallet(fetched); // 对应 fetch_wallet()
diff --git a/src/lib.rs b/src/lib.rs
index f78e33a..fa16efb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -87,6 +87,18 @@ pub unsafe extern "C" fn sign() {
     };
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn sss_sign() {
+    match wallet_impl::Wallet::retrieve_keys("wallet.json") {
+        Err(_) => {
+            println!("error sign");
+        }
+        Ok(w) => {
+            w.sss_sign();
+        } 
+    };
+}
+
 unsafe fn convert_to_cwallet(rwallet: Wallet) -> CWallet {
     // 转换Rust字符串数据为C的字符串并移交ownership
     let pubkey = CString::new(rwallet.public_key).unwrap();
diff --git a/src/wallet/wallet_impl.rs b/src/wallet/wallet_impl.rs
index 80d6e1d..0426ed3 100644
--- a/src/wallet/wallet_impl.rs
+++ b/src/wallet/wallet_impl.rs
@@ -1,7 +1,6 @@
 extern crate hex;
 
 use anyhow::Result;
-use web3::types::{ H256, Bytes };
 use secp256k1::{PublicKey, SecretKey, Message, Secp256k1};
 use secp256k1::rand::rngs::OsRng;
 use serde::{Deserialize, Serialize};
@@ -13,6 +12,8 @@ use web3::types::Address;
 use web3::signing::{ hash_message, SecretKeyRef, Key };
 use std::str;
 use core::fmt::Write;
+use shamir_secret_sharing::num_bigint::BigInt;
+use shamir_secret_sharing::ShamirSecretSharing as SSS;
 
 pub fn generate_keypair() -> (SecretKey, PublicKey) {
     let secp = Secp256k1::new();
@@ -41,10 +42,10 @@ impl Wallet {
         let addr: Address = public_key_address(&public_key);
         println!("secret key: {:?}", secret_key);
         let mut s = String::with_capacity(2 * 32);
-        // for i in &secret_key.secret_bytes() {
-        //     write!(s, "{:02x}", *i).unwrap();
-        // }
-        // println!("{:?}", s);
+        for i in &secret_key.serialize_secret() {
+            write!(s, "{:02x}", *i).unwrap();
+        }
+        println!("{:?}", s);
 
         
         Wallet {
@@ -74,6 +75,38 @@ impl Wallet {
         Ok(wallet)
     }
 
+    pub fn sss_sign(&self) {
+        let sss = SSS {
+            threshold: 2,
+            share_amount: 3,
+            prime: BigInt::parse_bytes(
+                b"fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f",
+                16,
+            )
+            .unwrap(),
+        };
+    
+        let secret = BigInt::parse_bytes(
+            b"64a6f7baa58d7381f4068fc729568009ef8f36e9c7d9c33d2cf06afc25c01e87",
+            16,
+        )
+        .unwrap();
+    
+        let shares = sss.split(secret.clone());
+        let key0 = shares[1].clone().1;
+        let key1 = shares[2].clone().1;
+        println!("key0: {:?}", key0.to_str_radix(16));
+        println!("key1: {:?}", key1.to_str_radix(16));
+        let kp0: (usize, BigInt) = (2, key0);
+        let kp1 = (3, key1);
+        let tmp = vec![kp0, kp1];
+        // println!("shares: {:?}", shares);
+        // assert_eq!(secret, sss.recover(&shares[..sss.threshold as usize]));
+        println!("secret: {:?}", secret.to_str_radix(16));
+        let secret_b = sss.recover(&tmp);
+        println!("recover: {:?}", secret_b.to_str_radix(16));
+    }
+
     pub fn sign<S>(&self, msg: S) -> Result<()> 
         where
             S: AsRef<[u8]>,{
@@ -85,7 +118,7 @@ impl Wallet {
         println!("secret key: {:?}", pk);
         
         let key = SecretKeyRef::new(&pk);
-        let signature = key.sign(message_hash.as_bytes(), None).expect("hash is non-zero 32-bytes; qed");;
+        let signature = key.sign(message_hash.as_bytes(), None).expect("hash is non-zero 32-bytes; qed");
         let v = signature
             .v
             .try_into()
@@ -104,11 +137,11 @@ impl Wallet {
         bytes.extend_from_slice(signature.s.as_bytes());
         bytes.push(v);
 
-        let mut string1 = String::with_capacity(2 * 65);
+        let mut str_sign = String::with_capacity(2 * 65);
         for i in bytes.iter() {
-            write!(string1, "{:02x}", i).unwrap();
+            write!(str_sign, "{:02x}", i).unwrap();
         }
-        println!("web3 sign: {:?}", string1);
+        println!("web3 sign: {:?}", str_sign);
         
         let message_to_hash = Message::from_slice(message_hash.as_ref()).unwrap();
         let (recovery_id, signature) = secp.sign_ecdsa_recoverable(&message_to_hash, &pk).serialize_compact();