diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/constant/HcsContractFieldConstant.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/constant/HcsContractFieldConstant.java
index 798c77d1..fa3bace4 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/constant/HcsContractFieldConstant.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/constant/HcsContractFieldConstant.java
@@ -52,6 +52,11 @@ public final class HcsContractFieldConstant {
 	 */
 	public static final String FIELD_CONTRACT_NO = "CONTRACT_NO";
 
+	/**
+	 * 业务合同号（fd 模板字段，值同合同编号 contractNo）
+	 */
+	public static final String FIELD_FD_BUS_CONTRACT_NUMBER = "fdBusContractNumber";
+
 	/**
 	 * 合同标题（fd 模板字段）
 	 */
diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/support/hcs/HcsContractSyncSupport.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/support/hcs/HcsContractSyncSupport.java
index 7feb31d0..b2968ee1 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/support/hcs/HcsContractSyncSupport.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/support/hcs/HcsContractSyncSupport.java
@@ -457,6 +457,8 @@ public class HcsContractSyncSupport {
 		// 【必填】合同编号：ContractManage.contractNo
 		fields.add(field(HcsContractFieldConstant.FIELD_FD_NUMBER, "合同编号", contractManage.getContractNo()));
 		fields.add(field(HcsContractFieldConstant.FIELD_CONTRACT_NO, "合同编号", contractManage.getContractNo()));
+		// 【必填】业务合同号：合规侧 2026-10-30 新增，值同合同编号 contractNo
+		fields.add(field(HcsContractFieldConstant.FIELD_FD_BUS_CONTRACT_NUMBER, "业务合同号", contractManage.getContractNo()));
 		// 【必填】合同标题：ContractManage.contractName
 		fields.add(field(HcsContractFieldConstant.FIELD_FD_SUBJECT, "合同标题", contractManage.getContractName()));
 		fields.add(field(HcsContractFieldConstant.FIELD_CONTRACT_NAME, "合同名称", contractManage.getContractName()));