diff --git a/CHANGELOG.md b/CHANGELOG.md
index b951b484..7bf41486 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## v1.0.24 / 2021-08-19
+
+- 微信支付V3版增加接口
+
 ## v1.0.23 / 2021-08-18
 
 - 优化微信支付V3版
diff --git a/README.md b/README.md
index 83009cd5..d0290107 100644
--- a/README.md
+++ b/README.md
@@ -11,5 +11,5 @@
 ## Install 安装
 
 ```Importing
-go get -v -u gitee.com/dtapps/go-library@v1.0.23
+go get -v -u gitee.com/dtapps/go-library@v1.0.24
 ```
diff --git a/library.go b/library.go
index 68de15be..9edaedc4 100644
--- a/library.go
+++ b/library.go
@@ -1,5 +1,5 @@
 package go_library
 
 func Version() string {
-	return "v1.0.23"
+	return "v1.0.24"
 }
diff --git a/service/wechatpayapiv3/pay_jsapi.go b/service/wechatpayapiv3/pay_jsapi.go
new file mode 100644
index 00000000..bea598c8
--- /dev/null
+++ b/service/wechatpayapiv3/pay_jsapi.go
@@ -0,0 +1,58 @@
+package wechatpayapiv3
+
+import (
+	"fmt"
+	"gitee.com/dtapps/go-library/utils/random"
+	"io/ioutil"
+	"os"
+	"time"
+)
+
+// GetJsApi 入参
+type GetJsApi struct {
+	Package string `json:"package"`
+}
+
+// GetJsApiResult 返回参数
+type GetJsApiResult struct {
+	AppId     string // 应用ID
+	TimeStamp string // 时间戳
+	NonceStr  string // 随机字符串
+	Package   string // 订单详情扩展字符串
+	SignType  string // 签名方式
+	PaySign   string // 签名
+}
+
+// GetJsApi JSAPI调起支付API https://pay.weixin.qq.com/wiki/doc/apiv3/apis/chapter3_1_4.shtml
+func (app *App) GetJsApi(param GetJsApi) (params GetJsApiResult, err error) {
+
+	// sign params
+	timeStamp := time.Now().Unix()
+	nonce := random.Alphanumeric(32)
+
+	params.AppId = app.AppId
+	params.TimeStamp = fmt.Sprintf("%v", timeStamp)
+	params.NonceStr = nonce
+	params.Package = param.Package
+
+	// 签名
+	message := fmt.Sprintf("%s\n%s\n%s\n%s\n", app.AppId, fmt.Sprintf("%v", timeStamp), nonce, param.Package)
+	open, err := os.Open(app.MchPrivateKey)
+	if err != nil {
+		return params, err
+	}
+	defer open.Close()
+	privateKey, err := ioutil.ReadAll(open)
+	if err != nil {
+		return params, err
+	}
+	signBytes, err := app.signPKCS1v15(message, privateKey)
+	if err != nil {
+		return params, err
+	}
+
+	sign := app.base64EncodeStr(signBytes)
+	params.PaySign = sign
+	params.SignType = "RSA"
+	return params, nil
+}
diff --git a/service/wechatpayapiv3/pay_transactions_jsapi.go b/service/wechatpayapiv3/pay_transactions_jsapi.go
index b6079611..49b24708 100644
--- a/service/wechatpayapiv3/pay_transactions_jsapi.go
+++ b/service/wechatpayapiv3/pay_transactions_jsapi.go
@@ -5,6 +5,7 @@ import (
 	"time"
 )
 
+// PayTransactionsJsapi 入参
 type PayTransactionsJsapi struct {
 	Description string                          `json:"description"`           //【是】商品描述
 	OutTradeNo  string                          `json:"out_trade_no"`          //【是】商户订单号
@@ -66,6 +67,7 @@ type PayTransactionsJsapiSettleInfo struct {
 	ProfitSharing bool `json:"profit_sharing,omitempty"` //【否】是否指定分账
 }
 
+// PayTransactionsJsapiResult 返回参数
 type PayTransactionsJsapiResult struct {
 	PrepayId string `json:"prepay_id"`
 }