diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/enumeration/WechatPayV3Type.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/enumeration/WechatPayV3Type.java
index 0f6659e..2653956 100644
--- a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/enumeration/WechatPayV3Type.java
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/enumeration/WechatPayV3Type.java
@@ -34,6 +34,11 @@ public enum WechatPayV3Type {
      */
     APP(HttpMethod.POST, "%s/v3/pay/transactions/app"),
 
+    /**
+     * 合单下单-APP支付API.
+     */
+    COMBINE_APP(HttpMethod.POST, "%s/v3/combine-transactions/app"),
+
     /**
      * H5支付.
      */
@@ -111,11 +116,21 @@ public enum WechatPayV3Type {
     MARKETING_FAVOR_CALLBACKS(HttpMethod.POST, "%s/v3/marketing/favor/callbacks");
 
 
-
-
+    /**
+     * The Pattern.
+     */
     private final String pattern;
+    /**
+     * The Method.
+     */
     private final HttpMethod method;
 
+    /**
+     * Instantiates a new Wechat pay v 3 type.
+     *
+     * @param method  the method
+     * @param pattern the pattern
+     */
     WechatPayV3Type(HttpMethod method, String pattern) {
         this.method = method;
         this.pattern = pattern;
diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/WechatCombinePayApi.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/WechatCombinePayApi.java
new file mode 100644
index 0000000..bf13f97
--- /dev/null
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/WechatCombinePayApi.java
@@ -0,0 +1,71 @@
+package cn.felord.payment.wechat.v3;
+
+import cn.felord.payment.wechat.WechatPayProperties;
+import cn.felord.payment.wechat.enumeration.WeChatServer;
+import cn.felord.payment.wechat.enumeration.WechatPayV3Type;
+import cn.felord.payment.wechat.v3.model.combine.CombinePayParams;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.springframework.http.RequestEntity;
+import org.springframework.web.util.UriComponentsBuilder;
+
+import java.net.URI;
+
+/**
+ * 微信合单支付.
+ *
+ * @author felord.cn
+ * @since 1.0.0.RELEASE
+ */
+public class WechatCombinePayApi extends AbstractApi{
+    /**
+     * Instantiates a new Abstract api.
+     *
+     * @param wechatPayClient the wechat pay client
+     * @param tenantId        the tenant id
+     */
+    public WechatCombinePayApi(WechatPayClient wechatPayClient, String tenantId) {
+        super(wechatPayClient, tenantId);
+    }
+
+    /**
+     * 合单下单-APP支付API
+     * <p>
+     * 使用合单支付接口，用户只输入一次密码，即可完成多个订单的支付。目前最多一次可支持50笔订单进行合单支付。
+     * <p>
+     * 注意：
+     * • 订单如果需要进行抽佣等，需要在合单中指定需要进行分账（profit_sharing为true）；指定后，交易资金进入二级商户账户，处于冻结状态，可在后续使用分账接口进行分账，利用分账完结进行资金解冻，实现抽佣和对二级商户的账期。
+     *
+     * @param combinePayParams the combine pay params
+     * @return the wechat response entity
+     */
+    public WechatResponseEntity<ObjectNode> appPay(CombinePayParams combinePayParams) {
+        WechatResponseEntity<ObjectNode> wechatResponseEntity = new WechatResponseEntity<>();
+        this.client().withType(WechatPayV3Type.APP, combinePayParams)
+                .function(this::combinePayFunction)
+                .consumer(wechatResponseEntity::convert)
+                .request();
+        return wechatResponseEntity;
+    }
+
+
+    /**
+     * Combine pay function request entity.
+     *
+     * @param type   the type
+     * @param params the params
+     * @return the request entity
+     */
+    private RequestEntity<?> combinePayFunction(WechatPayV3Type type, CombinePayParams params) {
+        WechatPayProperties.V3 v3 = this.wechatMetaBean().getV3();
+        params.setCombineAppid(v3.getAppId());
+        params.setCombineMchid(v3.getMchId());
+
+        String notifyUrl = v3.getDomain().concat(params.getNotifyUrl());
+        params.setNotifyUrl(notifyUrl);
+        URI uri = UriComponentsBuilder.fromHttpUrl(type.uri(WeChatServer.CHINA))
+                .build()
+                .toUri();
+        return Post(uri, params);
+    }
+
+}
diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombineAmount.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombineAmount.java
new file mode 100644
index 0000000..ab9e9fe
--- /dev/null
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombineAmount.java
@@ -0,0 +1,25 @@
+
+package cn.felord.payment.wechat.v3.model.combine;
+
+
+import lombok.Data;
+
+/**
+ * 合单支付订单金额信息.
+ *
+ * @author felord.cn
+ * @since 1.0.0.RELEASE
+ */
+@Data
+public class CombineAmount {
+    /**
+     * 符合ISO 4217标准的三位字母代码，必填，人民币：CNY 。
+     */
+    private String currency = "CNY";
+    /**
+     * 子单金额，单位为分，必填
+     * <p>
+     * 境外场景下，标价金额要超过商户结算币种的最小单位金额，例如结算币种为美元，则标价金额必须大于1美分
+     */
+    private Long totalAmount;
+}
diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombinePayParams.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombinePayParams.java
new file mode 100644
index 0000000..ec0d6e2
--- /dev/null
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombinePayParams.java
@@ -0,0 +1,62 @@
+
+package cn.felord.payment.wechat.v3.model.combine;
+
+import cn.felord.payment.wechat.v3.model.SettleInfo;
+import lombok.Data;
+
+import java.time.OffsetDateTime;
+import java.util.List;
+
+/**
+ * 合单支付参数.
+ *
+ * @author felord.cn
+ * @since 1.0.0.RELEASE
+ */
+@Data
+public class CombinePayParams {
+
+    /**
+     * 合单商户appid，必填
+     */
+    private String combineAppid;
+    /**
+     * 合单商户号，必填
+     */
+    private String combineMchid;
+    /**
+     * 合单商户订单号，必填，商户侧需要保证同一商户下唯一
+     */
+    private String combineOutTradeNo;
+    /**
+     * 合单支付者信息，选填
+     */
+    private CombinePayerInfo combinePayerInfo;
+    /**
+     * 通知地址，必填，接收微信支付异步通知回调地址，通知url必须为直接可访问的URL，不能携带参数。
+     * <p>
+     * <strong>合单支付需要独立的通知地址。</strong>
+     */
+    private String notifyUrl;
+    /**
+     * 合单支付场景信息描述，选填
+     */
+    private CombineSceneInfo sceneInfo;
+    /**
+     * 子单信息，必填，最多50单
+     */
+    private List<SubOrder> subOrders;
+    /**
+     * 结算信息，选填
+     */
+    private SettleInfo settleInfo;
+    /**
+     * 交易起始时间，选填
+     */
+    private OffsetDateTime timeStart;
+    /**
+     * 交易结束时间，选填
+     */
+    private OffsetDateTime timeExpire;
+
+}
diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombinePayerInfo.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombinePayerInfo.java
new file mode 100644
index 0000000..90bee19
--- /dev/null
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombinePayerInfo.java
@@ -0,0 +1,19 @@
+
+package cn.felord.payment.wechat.v3.model.combine;
+
+
+import lombok.Data;
+
+/**
+ * 合单支付，支付者信息.
+ *
+ * @author felord.cn
+ * @since 1.0.0.RELEASE
+ */
+@Data
+public class CombinePayerInfo {
+    /**
+     * 使用合单appid获取的对应用户openid。是用户在商户appid下的唯一标识。
+     */
+    private String openid;
+}
diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombineSceneInfo.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombineSceneInfo.java
new file mode 100644
index 0000000..d32258f
--- /dev/null
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/CombineSceneInfo.java
@@ -0,0 +1,22 @@
+
+package cn.felord.payment.wechat.v3.model.combine;
+
+import lombok.Data;
+
+/**
+ * 合单支付场景信息.
+ *
+ * @author felord.cn
+ * @since 1.0.0.RELEASE
+ */
+@Data
+public class CombineSceneInfo {
+    /**
+     * 商户设备号，选填。
+     */
+    private String deviceId;
+    /**
+     * 用户终端ip,必填。
+     */
+    private String payerClientIp;
+}
diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/SubOrder.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/SubOrder.java
new file mode 100644
index 0000000..ccd2a7b
--- /dev/null
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/combine/SubOrder.java
@@ -0,0 +1,49 @@
+
+package cn.felord.payment.wechat.v3.model.combine;
+
+import lombok.Data;
+
+/**
+ * 子单信息，最多50单.
+ *
+ * @author felord.cn
+ * @since 1.0.0.RELEASE
+ */
+@Data
+public class SubOrder {
+    /**
+     * 合单支付订单金额信息，必填。
+     */
+    private CombineAmount amount;
+
+    /**
+     * 附加数据，必填，在查询API和支付通知中原样返回，可作为自定义参数使用。
+     */
+    private String attach;
+
+    /**
+     * 商品描述，必填，需传入应用市场上的APP名字-实际商品名称，例如：天天爱消除-游戏充值。
+     */
+    private String description;
+
+    /**
+     * 子单发起方商户号，必填，必须与发起方appid有绑定关系。
+     */
+    private String mchid;
+
+    /**
+     * 子单商户订单号，必填，商户系统内部订单号，要求32个字符内，只能是数字、大小写字母_-|*@ ，且在同一个商户号下唯一。
+     */
+    private String outTradeNo;
+
+    /**
+     * 二级商户商户号，由微信支付生成并下发。
+     * <p>
+     * 服务商子商户的商户号，被合单方。
+     * <p>
+     * 直连商户不用传二级商户号。
+     */
+    private String subMchid;
+
+
+}