diff --git a/index.js b/index.js
index db200e9..6d6d192 100644
--- a/index.js
+++ b/index.js
@@ -3,6 +3,7 @@ const crypto=require('crypto')
 const nacl = require('tweetnacl')
 const bs58check = require('bs58check')
 const uuid = require('uuid')
+const keccak = require('keccak')
 const Secword = require('bitcore-mnemonic') // https://bitcore.io/api/mnemonic/   https://github.com/bitpay/bitcore-mnemonic
 // const bip39 = require('bip39') // https://github.com/bitcoinjs/bip39 // 有更多语言，但不方便选择语言，也不能使用 pass
 // const HDKey = require('hdkey') // https://github.com/cryptocoinjs/hdkey // 或者用 bitcore-mnemonic 或者 ethers 里的相同功能
@@ -192,6 +193,28 @@ module.exports = {
     return null
   }
   ,
+  secword2account:function(secword, option){ // account 比 keypair 多了 address 字段。
+    option=option||{}
+    option.coin=my.COIN_LIST.indexOf(option.coin)>=0?option.coin:my.COIN
+    let kp=this.secword2keypair(secword, option)
+    if (kp) {
+      kp.address=this.seckey2address(kp.seckey, option)
+      return kp 
+    }
+    return null
+  }
+  ,
+  secword2address:function(secword, option){
+    option=option||{}
+    option.coin=my.COIN_LIST.indexOf(option.coin)>=0?option.coin:my.COIN
+    let address
+    let kp=this.secword2keypair(secword, option)
+    if (kp) {
+      return this.seckey2address(kp.seckey,option)
+    }
+    return null
+  }
+  ,
   seckey2pubkey:function(seckey, option){
     option=option||{}
     option.coin=my.COIN_LIST.indexOf(option.coin)>=0?option.coin:my.COIN
@@ -210,24 +233,18 @@ module.exports = {
     return null
   }
   ,
-  secword2account:function(secword, option){ // account 比 keypair 多了 address 字段。
+  seckey2address: function(seckey, option){
     option=option||{}
     option.coin=my.COIN_LIST.indexOf(option.coin)>=0?option.coin:my.COIN
-    let kp=this.secword2keypair(secword, option)
-    if (kp) {
-      kp.address=this.pubkey2address(kp.pubkey, option)
-      return kp 
-    }
-    return null
-  }
-  ,
-  secword2address:function(secword, option){
-    option=option||{}
-    option.coin=my.COIN_LIST.indexOf(option.coin)>=0?option.coin:my.COIN
-    let address
-    let kp=this.secword2keypair(secword, option)
-    if (kp) {
-      return this.pubkey2address(kp.pubkey,option)
+    if (this.isSeckey(seckey)){
+      let pubkey
+      if (option.coin==='ETH'){
+        pubkey = this.seckey2pubkey(seckey, {compress:'uncompressed'})
+        return this.pubkey2address(pubkey, option)
+      }else {
+        pubkey = this.seckey2pubkey(seckey, {compress:'compressed'})
+        return this.pubkey2address(pubkey, option)
+      }
     }
     return null
   }
@@ -262,20 +279,25 @@ module.exports = {
       let h160 = crypto.createHash('ripemd160').update(h256).digest('hex')
       let prefix
       if (option.coin==='TIC'){
-        switch(option.netType){
+        switch (option.netType){
           case 'mainnet': prefix='42'; break; // '42'=>T, '6E'=>m
           case 'testnet': prefix='7F'; break; // '7F'=>t
           case 'devnet': prefix='5A'; break; // '5A'=>d
           default: prefix='42' // 默认暂且为 42，为了兼容已经运行的链。
         }
-      }else if(option.coin==='BTC'){
+      }else if (option.coin==='BTC'){
         switch (option.netType) {
           case 'mainnet': prefix='00'; break; // 1
           case 'testnet': prefix='6f'; break; // m or n
           case 'p2sh': prefix='05'; break; // 3
           default: prefix='00'
         }
-      }else { // 目前不支持 ETH或其他币种 地址转换，因为这会大量增加前端打包的js。
+      }else if (option.coin==='ETH'){
+        // 注意，必须要用非压缩的64字节的公钥的buffer。
+        return '0x' + keccak('keccak256').update(Buffer.from(pubkey.slice(2),'hex')).digest('hex').slice(-40)
+        // 或 const { keccak256 } = require('ethereumjs-util'); keccak256(Buffer.from(pubkey.slice(2),'hex)).toString('hex').slice(40)
+        // 或 const { Keccak } = require('sha3'); new Keccak('').update(Bufer.from(pubkey.slice(2),'hex')).digest('hex').slice(-40)
+      }else {
         return null
       }
       var wifAddress=bs58check.encode(Buffer.from(prefix+h160,'hex')) // wallet import format
diff --git a/package.json b/package.json
index d97c09a..a244b50 100644
--- a/package.json
+++ b/package.json
@@ -6,11 +6,12 @@
     "bignumber.js": "^6.0.0",
     "bitcore-mnemonic": "^1.5.0",
     "bs58check": "^2.1.1",
+    "ethereumjs-util": "^6.2.0",
+    "sha3": "^2.1.1",
     "tweetnacl": "^1.0.0",
     "uuid": "^3.3.2"
   },
-  "devDependencies": {
-  },
+  "devDependencies": {},
   "scripts": {
     "setup": "npm install"
   },