diff --git a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/oa/WxCpApprovalDetailResult.java b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/oa/WxCpApprovalDetailResult.java
index 7d55ff878..fe77fcaea 100644
--- a/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/oa/WxCpApprovalDetailResult.java
+++ b/weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/oa/WxCpApprovalDetailResult.java
@@ -91,6 +91,12 @@ public static class WxCpApprovalDetail implements Serializable {
     @SerializedName("comments")
     private List<WxCpApprovalComment> comments;
 
+    /**
+     * 审批单据的总金额（单位：分），当审批单包含费用相关控件时返回
+     */
+    @SerializedName("sum_money")
+    private Long sumMoney;
+
   }
 
 }
diff --git a/weixin-java-cp/src/test/java/me/chanjar/weixin/cp/api/impl/WxCpOaServiceImplTest.java b/weixin-java-cp/src/test/java/me/chanjar/weixin/cp/api/impl/WxCpOaServiceImplTest.java
index f722a248d..c7cc048db 100644
--- a/weixin-java-cp/src/test/java/me/chanjar/weixin/cp/api/impl/WxCpOaServiceImplTest.java
+++ b/weixin-java-cp/src/test/java/me/chanjar/weixin/cp/api/impl/WxCpOaServiceImplTest.java
@@ -443,6 +443,80 @@ public void testGetApprovalDetail() throws WxErrorException {
     System.out.println(gson.toJson(result));
   }
 
+  /**
+   * Test sum_money field deserialization in approval detail.
+   * 测试审批详情中总费用金额字段的反序列化
+   */
+  @Test
+  public void testApprovalDetailSumMoney() {
+    // 测试包含总费用金额的审批详情JSON
+    String jsonWithSumMoney = "{\n" +
+      "  \"errcode\": 0,\n" +
+      "  \"errmsg\": \"ok\",\n" +
+      "  \"info\": {\n" +
+      "    \"sp_no\": \"202601140001\",\n" +
+      "    \"sp_name\": \"报销申请\",\n" +
+      "    \"sp_status\": 2,\n" +
+      "    \"template_id\": \"test_template_id\",\n" +
+      "    \"apply_time\": 1610000000,\n" +
+      "    \"applyer\": {\n" +
+      "      \"userid\": \"test_user\",\n" +
+      "      \"partyid\": \"1\"\n" +
+      "    },\n" +
+      "    \"sp_record\": [],\n" +
+      "    \"notifyer\": [],\n" +
+      "    \"apply_data\": {\n" +
+      "      \"contents\": []\n" +
+      "    },\n" +
+      "    \"comments\": [],\n" +
+      "    \"sum_money\": 100000\n" +
+      "  }\n" +
+      "}";
+
+    WxCpApprovalDetailResult result = WxCpGsonBuilder.create().fromJson(jsonWithSumMoney, WxCpApprovalDetailResult.class);
+    assertThat(result).isNotNull();
+    assertThat(result.getErrCode()).isEqualTo(0);
+    assertThat(result.getInfo()).isNotNull();
+    assertThat(result.getInfo().getSpNo()).isEqualTo("202601140001");
+    assertThat(result.getInfo().getSpName()).isEqualTo("报销申请");
+    assertThat(result.getInfo().getSumMoney()).isNotNull();
+    assertThat(result.getInfo().getSumMoney()).isEqualTo(100000L);
+
+    System.out.println("成功解析总费用金额字段 sum_money: " + result.getInfo().getSumMoney());
+
+    // 测试不包含 sum_money 字段的情况（向后兼容）
+    String jsonWithoutSumMoney = "{\n" +
+      "  \"errcode\": 0,\n" +
+      "  \"errmsg\": \"ok\",\n" +
+      "  \"info\": {\n" +
+      "    \"sp_no\": \"202601140002\",\n" +
+      "    \"sp_name\": \"请假申请\",\n" +
+      "    \"sp_status\": 1,\n" +
+      "    \"template_id\": \"test_template_id\",\n" +
+      "    \"apply_time\": 1610000000,\n" +
+      "    \"applyer\": {\n" +
+      "      \"userid\": \"test_user\",\n" +
+      "      \"partyid\": \"1\"\n" +
+      "    },\n" +
+      "    \"sp_record\": [],\n" +
+      "    \"notifyer\": [],\n" +
+      "    \"apply_data\": {\n" +
+      "      \"contents\": []\n" +
+      "    },\n" +
+      "    \"comments\": []\n" +
+      "  }\n" +
+      "}";
+
+    WxCpApprovalDetailResult resultWithoutMoney = WxCpGsonBuilder.create().fromJson(jsonWithoutSumMoney, WxCpApprovalDetailResult.class);
+    assertThat(resultWithoutMoney).isNotNull();
+    assertThat(resultWithoutMoney.getInfo()).isNotNull();
+    assertThat(resultWithoutMoney.getInfo().getSpNo()).isEqualTo("202601140002");
+    assertThat(resultWithoutMoney.getInfo().getSumMoney()).isNull();
+
+    System.out.println("成功处理不包含 sum_money 字段的情况（向后兼容）");
+    System.out.println("完整测试通过！");
+  }
+
   /**
    * Test get template detail.
    *