diff --git a/packages/coin-cosmos/CHANGELOG.md b/packages/coin-cosmos/CHANGELOG.md
index ef37eac..af23db6 100644
--- a/packages/coin-cosmos/CHANGELOG.md
+++ b/packages/coin-cosmos/CHANGELOG.md
@@ -18,4 +18,8 @@ All notable changes to this project will be documented in this file.
 
 - **coin-cosmos:** add cosmos common wallet ([17](https://github.com/okx/js-wallet-sdk/pull/17))
 
+# [1.0.4](https://github.com/okx/js-wallet-sdk) (2023-11-13)
+
+- **coin-cosmos:** fix injective wallet sign message bug ([24](https://github.com/okx/js-wallet-sdk/pull/24))
+
 
diff --git a/packages/coin-cosmos/package.json b/packages/coin-cosmos/package.json
index 2301f06..c2936ad 100644
--- a/packages/coin-cosmos/package.json
+++ b/packages/coin-cosmos/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@okxweb3/coin-cosmos",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
diff --git a/packages/coin-cosmos/src/CosmosWallet.ts b/packages/coin-cosmos/src/CosmosWallet.ts
index 2378f01..ce47201 100644
--- a/packages/coin-cosmos/src/CosmosWallet.ts
+++ b/packages/coin-cosmos/src/CosmosWallet.ts
@@ -42,7 +42,9 @@ import {
   getMPCTransaction,
   validSignedTransaction,
   getMPCSignedMessage,
-} from './index';
+  signWithStdSignDocForINJ,
+  SignWithSignDocForINJ,
+} from './';
 
 export interface CosmosTransferParam {
   fromAddress: string
@@ -669,6 +671,26 @@ export class InjectiveWallet extends CosmosWallet {
   pubKeyUrl(): string | undefined {
     return "/injective.crypto.v1beta1.ethsecp256k1.PubKey";
   }
+
+  async signMessage(param: SignTxParams): Promise<string> {
+    try {
+      const ethSign = this.supportEthSign()
+      let privateKey;
+      if (param.privateKey) {
+        privateKey = base.fromHex(param.privateKey);
+      }
+      const message = param.data as SignMessageData
+      if (message.type == "amino") {
+        const result = await signWithStdSignDocForINJ(privateKey as Buffer, message.data, ethSign)
+        return Promise.resolve(result);
+      } else {
+        const result = await SignWithSignDocForINJ(privateKey as Buffer, message.data, ethSign)
+        return Promise.resolve(result);
+      }
+    } catch (e) {
+      return Promise.reject(SignMsgError);
+    }
+  }
 }
 
 export class CelestiaWallet extends CosmosWallet {
diff --git a/packages/coin-cosmos/src/index.ts b/packages/coin-cosmos/src/index.ts
index f216b03..d12911d 100644
--- a/packages/coin-cosmos/src/index.ts
+++ b/packages/coin-cosmos/src/index.ts
@@ -186,6 +186,33 @@ export interface SignDocMessage {
     accountNumber: string;
 }
 
+export async function SignWithSignDocForINJ(privateKey: Uint8Array, message: string, useEthSecp256k1: boolean) {
+    const m: SignDocMessage = JSON.parse(message)
+    const signDoc = makeSignDoc(base.fromHex(m.body), base.fromHex(m.authInfo), m.chainId, parseInt(m.accountNumber));
+    if (!privateKey) {
+        const signDocBytes = makeSignBytes(signDoc);
+        const messageHash = useEthSecp256k1 ? base.keccak256(signDocBytes) : base.sha256(signDocBytes);
+        return Promise.resolve(base.toHex(messageHash));
+    }
+    const publicKey = private2Public(privateKey, true)
+    const signDocBytes = makeSignBytes(signDoc);
+    const messageHash = useEthSecp256k1 ? base.keccak256(signDocBytes) : base.sha256(signDocBytes);
+    const { signature } = signUtil.secp256k1.sign(Buffer.from(messageHash), privateKey)
+    return Promise.resolve(encodeSecp256k1Signature(publicKey, signature, false))
+}
+
+export async function signWithStdSignDocForINJ(privateKey: Uint8Array, message: string, useEthSecp256k1: boolean) {
+    const m: amino.StdSignDoc = JSON.parse(message)
+    const signDocBytes = amino.serializeSignDoc(m)
+    const messageHash = useEthSecp256k1 ? base.keccak256(signDocBytes) : base.sha256(signDocBytes);
+    if (!privateKey) {
+        return Promise.resolve(base.toHex(messageHash));
+    }
+    const { signature } = signUtil.secp256k1.sign(Buffer.from(messageHash), privateKey)
+    const publicKey = private2Public(privateKey, true)
+    return Promise.resolve(encodeSecp256k1Signature(publicKey, signature, false))
+}
+
 export async function SignWithSignDoc(privateKey: Uint8Array, message: string, useEthSecp256k1: boolean) {
     const m: SignDocMessage = JSON.parse(message)
     const signDoc = makeSignDoc(base.fromHex(m.body), base.fromHex(m.authInfo), m.chainId, parseInt(m.accountNumber));
diff --git a/packages/coin-cosmos/tests/luna.test.ts b/packages/coin-cosmos/tests/luna.test.ts
index 5c3e730..a83dd52 100644
--- a/packages/coin-cosmos/tests/luna.test.ts
+++ b/packages/coin-cosmos/tests/luna.test.ts
@@ -1,18 +1,20 @@
-import { base} from '@okxweb3/crypto-lib';
+import {base} from '@okxweb3/crypto-lib';
 import {
-    getNewAddress,
-    validateAddress,
-    sendToken,
     amount2Coin,
-    amount2StdFee,
     amount2Coins,
-    sendIBCToken,
-    sendAminoMessage,
-    sendMessages,
-    GammRegistry,
+    amount2StdFee,
+    CommonCosmosWallet,
     GammAminoConverters,
+    GammRegistry,
+    getNewAddress,
+    InjectiveWallet,
     SeiWallet,
-    CommonCosmosWallet
+    sendAminoMessage,
+    sendIBCToken,
+    sendMessages,
+    sendToken,
+    SignMessageData,
+    validateAddress
 } from '../src';
 
 describe("luna", () => {
@@ -259,6 +261,62 @@ describe("injective", () => {
         )
         console.info(v)
     });
+
+    test("injective-signmessage", async () => {
+        const privateKey = "ebc42dae1245fad403bd18f59f7283dc18724d2fc843b61e01224b9789057347"
+        const wallet = new InjectiveWallet()
+        const message = "{\n" +
+            "    \"accountNumber\": \"6666\",\n" +
+            "    \"chainId\": \"injective-1\",\n" +
+            "    \"body\": \"0a00\",\n" +
+            "    \"authInfo\": \"0a0912040a02087f188a3412110a0f0a03696e6a12083433393939393939\"\n" +
+            "}";
+        const data: SignMessageData = {type: "signDoc", data: message}
+        const v = await wallet.signMessage({privateKey, data})
+        console.info(v)
+    });
+
+    test("injective-signmessage-2", async () => {
+        const privateKey = "ebc42dae1245fad403bd18f59f7283dc18724d2fc843b61e01224b9789057347"
+        const wallet = new InjectiveWallet()
+        const message = "{\n" +
+            "    \"account_number\": \"833360\",\n" +
+            "    \"chain_id\": \"injective-1\",\n" +
+            "    \"fee\": {\n" +
+            "        \"amount\": [\n" +
+            "            {\n" +
+            "                \"amount\": \"100000000000000000\",\n" +
+            "                \"denom\": \"inj\"\n" +
+            "            }\n" +
+            "        ],\n" +
+            "        \"gas\": \"174651\"\n" +
+            "    },\n" +
+            "    \"memo\": \"\",\n" +
+            "    \"msgs\": [\n" +
+            "        {\n" +
+            "            \"type\": \"sei/poolmanager/swap-exact-amount-in\",\n" +
+            "            \"value\": {\n" +
+            "                \"routes\": [\n" +
+            "                    {\n" +
+            "                        \"pool_id\": \"1\",\n" +
+            "                        \"token_out_denom\": \"ibc/27394FB092D2ECCD56123C74F36E4C1F926001CEADA9CA97EA622B25F41E5EB2\"\n" +
+            "                    }\n" +
+            "                ],\n" +
+            "                \"sender\": \"inj1ywqe8057srngat8rtz95tkx0ffl2urarkegcc8\",\n" +
+            "                \"token_in\": {\n" +
+            "                    \"amount\": \"10000\",\n" +
+            "                    \"denom\": \"inj\"\n" +
+            "                },\n" +
+            "                \"token_out_min_amount\": \"545\"\n" +
+            "            }\n" +
+            "        }\n" +
+            "    ],\n" +
+            "    \"sequence\": \"20\"\n" +
+            "}";
+        const data: SignMessageData = {type: "amino", data: message}
+        const v = await wallet.signMessage({privateKey, data})
+        console.info(v)
+    });
 });
 
 describe("common_wallet", () => {