diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayScoreBillExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayScoreBillExtensions.cs
new file mode 100644
index 00000000..fde4cca8
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayScoreBillExtensions.cs
@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Flurl;
+using Flurl.Http;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
+{
+    /// <summary>
+    /// 为 <see cref="WechatTenpayClient"/> 提供微信支付分账单相关的 API 扩展方法。
+    /// </summary>
+    public static class WechatTenpayClientExecutePayScoreBillExtensions
+    {
+        /// <summary>
+        /// <para>异步调用 [GET] /payscore/merchant-bill 接口。</para>
+        /// <para>REF: https://pay.weixin.qq.com/wiki/doc/apiv3/apis/chapter6_1_29.shtml </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.GetPayScoreMerchantBillResponse> ExecuteGetPayScoreMerchantBillAsync(this WechatTenpayClient client, Models.GetPayScoreMerchantBillRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Get, "payscore", "merchant-bill")
+                .SetQueryParam("bill_date", request.BillDateString)
+                .SetQueryParam("algorithm", request.Algorithm)
+                .SetQueryParam("tar_type", request.TarType)
+                .SetQueryParam("algorithm", request.Algorithm);
+
+            if (!string.IsNullOrEmpty(request.TarType))
+                flurlReq.SetQueryParam("tar_type", request.TarType);
+
+            return await client.SendRequestWithJsonAsync<Models.GetPayScoreMerchantBillResponse>(flurlReq, cancellationToken: cancellationToken);
+        }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/EcommerceBill/GetEcommerceBillFundflowBillRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/EcommerceBill/GetEcommerceBillFundflowBillRequest.cs
index c410bc93..0b1cf950 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/EcommerceBill/GetEcommerceBillFundflowBillRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/EcommerceBill/GetEcommerceBillFundflowBillRequest.cs
@@ -32,6 +32,7 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
 
         /// <summary>
         /// 获取或设置加密算法。
+        /// <para>默认值：<see cref="Constants.EncryptionAlgorithms.AEAD_AES_256_GCM"/></para>
         /// </summary>
         [Newtonsoft.Json.JsonIgnore]
         [System.Text.Json.Serialization.JsonIgnore]
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayScoreBill/GetPayScoreMerchantBillRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayScoreBill/GetPayScoreMerchantBillRequest.cs
new file mode 100644
index 00000000..e0b2f3b7
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayScoreBill/GetPayScoreMerchantBillRequest.cs
@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /payscore/merchant-bill 接口的请求。</para>
+    /// </summary>
+    public class GetPayScoreMerchantBillRequest : WechatTenpayRequest
+    {
+        /// <summary>
+        /// 获取或设置账单日期（格式：yyyy-MM-dd）。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string BillDateString { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置服务 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string ServiceId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置压缩类型。
+        /// <para>默认值：GZIP</para>
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string TarType { get; set; } = "GZIP";
+
+        /// <summary>
+        /// 获取或设置加密算法。
+        /// <para>默认值：<see cref="Constants.EncryptionAlgorithms.AEAD_AES_256_GCM"/></para>
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string Algorithm { get; set; } = Constants.EncryptionAlgorithms.AEAD_AES_256_GCM;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayScoreBill/GetPayScoreMerchantBillResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayScoreBill/GetPayScoreMerchantBillResponse.cs
new file mode 100644
index 00000000..36d3a61a
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayScoreBill/GetPayScoreMerchantBillResponse.cs
@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /payscore/merchant-bill 接口的响应。</para>
+    /// </summary>
+    public class GetPayScoreMerchantBillResponse : WechatTenpayResponse
+    {
+        public static class Types
+        {
+            public class DownloadBill
+            {
+                /// <summary>
+                /// 获取或设置账单文件序号。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("bill_sequence")]
+                [System.Text.Json.Serialization.JsonPropertyName("bill_sequence")]
+                public int BillSequence { get; set; }
+
+                /// <summary>
+                /// 获取或设置哈希类型。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("hash_type")]
+                [System.Text.Json.Serialization.JsonPropertyName("hash_type")]
+                public string HashType { get; set; } = default!;
+
+                /// <summary>
+                /// 获取或设置哈希值。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("hash_value")]
+                [System.Text.Json.Serialization.JsonPropertyName("hash_value")]
+                public string HashValue { get; set; } = default!;
+
+                /// <summary>
+                /// 获取或设置账单下载地址。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("download_url")]
+                [System.Text.Json.Serialization.JsonPropertyName("download_url")]
+                public string DownloadUrl { get; set; } = default!;
+
+                /// <summary>
+                /// 获取或设置账单加密密钥（需使用商户私钥解密）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("encrypt_key")]
+                [System.Text.Json.Serialization.JsonPropertyName("encrypt_key")]
+                public string EncryptKey { get; set; } = default!;
+
+                /// <summary>
+                /// 获取或设置账单加密使用的随机字符串。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("nonce")]
+                [System.Text.Json.Serialization.JsonPropertyName("nonce")]
+                public string Nonce { get; set; } = default!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置下载信息总数。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("download_bill_count")]
+        [System.Text.Json.Serialization.JsonPropertyName("download_bill_count")]
+        public int DownloadBillCount { get; set; }
+
+        /// <summary>
+        /// 获取或设置下载信息明细列表。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("download_bill_list")]
+        [System.Text.Json.Serialization.JsonPropertyName("download_bill_list")]
+        public Types.DownloadBill[] DownloadBillList { get; set; } = default!;
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/PayScoreBill/GetPayScoreMerchantBillRequest.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/PayScoreBill/GetPayScoreMerchantBillRequest.json
new file mode 100644
index 00000000..22fdca1b
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/PayScoreBill/GetPayScoreMerchantBillRequest.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/PayScoreBill/GetPayScoreMerchantBillResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/PayScoreBill/GetPayScoreMerchantBillResponse.json
new file mode 100644
index 00000000..30d2555e
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/PayScoreBill/GetPayScoreMerchantBillResponse.json
@@ -0,0 +1,13 @@
+{
+    "download_bill_count": 1,
+    "download_bill_list": [
+        {
+            "bill_sequence": 1,
+            "download_url": "https://api.mch.weixin.qq.com/v3/payscore/bill/downloadurl?token=xxx",
+            "encrypt_key": "a0YK7p+9XaKzE9N4qtFfG/9za1oqKlLXXJWBkH+kX84onAs2Ol/E1fk+6S+FuBXczGDRU8I8D+6PfbwKYBGm0wANUTqHOSezzfbieIo2t51UIId7sP9SoN38W2+IcYDviIsu59KSdyiL3TY2xqZNT8UDcnMWzTNZdSv+CLsSgblB6OKGN9JONTadOFGfv1OKkTp86Li+X7S9bG62wsa572/5Rm4MmDCiKwY4bX2EynWQHBEOExD5URxT6/MX3F1D3BNYrE4fUu1F03k25xVlXnZDjksy6Rf3SCgadR+Cepc6mdfF9b2gTxNsJFMEdYXbqL0W1WQZ3UqSPQCguK6uLA==",
+            "hash_type": "SHA1",
+            "hash_value": "79bb0f45fc4c42234a918000b2668d689e2bde04",
+            "nonce": "5K8264ILTKCH16CQ2502SI8ZNMTM67VS"
+        }
+    ]
+}
\ No newline at end of file