diff --git a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/ErpContractChangeInfo.java b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/ErpContractChangeInfo.java
index 64af4f15..22ff0c15 100644
--- a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/ErpContractChangeInfo.java
+++ b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/ErpContractChangeInfo.java
@@ -188,7 +188,7 @@ public class ErpContractChangeInfo extends TenantEntity {
     /**
      * 签字合同附件
      */
-    private Long signatureAppendix;
+    private String signatureAppendix;
 
     /**
      * 质保期(天)
diff --git a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/ErpContractInfo.java b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/ErpContractInfo.java
index 0f4ddd19..ed28a571 100644
--- a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/ErpContractInfo.java
+++ b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/ErpContractInfo.java
@@ -173,9 +173,9 @@ public class ErpContractInfo extends TenantEntity {
     private String paymentMethod;
 
     /**
-     * 签字合同附件
+     * 签字合同附件（多个 OSS ID，逗号分隔）
      */
-    private Long signatureAppendix;
+    private String signatureAppendix;
 
     /**
      * 海威SAP订单号
diff --git a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/bo/ErpContractChangeInfoBo.java b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/bo/ErpContractChangeInfoBo.java
index 987a3f76..06b777d1 100644
--- a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/bo/ErpContractChangeInfoBo.java
+++ b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/bo/ErpContractChangeInfoBo.java
@@ -186,7 +186,7 @@ public class ErpContractChangeInfoBo extends BaseEntity {
     /**
      * 签字合同附件
      */
-    private Long signatureAppendix;
+    private String signatureAppendix;
 
     /**
      * 质保期(天)
diff --git a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/bo/ErpContractInfoBo.java b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/bo/ErpContractInfoBo.java
index 462d4d1e..defea538 100644
--- a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/bo/ErpContractInfoBo.java
+++ b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/bo/ErpContractInfoBo.java
@@ -183,7 +183,7 @@ public class ErpContractInfoBo extends BaseEntity {
     /**
      * 签字合同附件
      */
-    private Long signatureAppendix;
+    private String signatureAppendix;
 
     /**
      * 海威SAP订单号
diff --git a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/vo/ErpContractChangeInfoVo.java b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/vo/ErpContractChangeInfoVo.java
index 1a088319..213dbe13 100644
--- a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/vo/ErpContractChangeInfoVo.java
+++ b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/vo/ErpContractChangeInfoVo.java
@@ -224,7 +224,7 @@ public class ErpContractChangeInfoVo implements Serializable {
      * 签字合同附件
      */
     @ExcelProperty(value = "签字合同附件")
-    private Long signatureAppendix;
+    private String signatureAppendix;
 
     /**
      * 质保期(天)
diff --git a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/vo/ErpContractInfoVo.java b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/vo/ErpContractInfoVo.java
index 8d7f1b01..a7ecb5a4 100644
--- a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/vo/ErpContractInfoVo.java
+++ b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/domain/vo/ErpContractInfoVo.java
@@ -238,7 +238,7 @@ public class ErpContractInfoVo implements Serializable {
      * 签字合同附件
      */
     @ExcelProperty(value = "签字合同附件")
-    private Long signatureAppendix;
+    private String signatureAppendix;
 
     /**
      * 海威SAP订单号
diff --git a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/service/impl/ErpContractOrderServiceImpl.java b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/service/impl/ErpContractOrderServiceImpl.java
index fee1fedc..ff7e6df5 100644
--- a/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/service/impl/ErpContractOrderServiceImpl.java
+++ b/ruoyi-modules/ruoyi-oa/src/main/java/org/dromara/oa/erp/service/impl/ErpContractOrderServiceImpl.java
@@ -316,7 +316,7 @@ public class ErpContractOrderServiceImpl implements IErpContractOrderService {
             // 上传终版合同时：激活合同并校验甲方客户资料
             if (StringUtils.isNotBlank(bo.getOssId())) {
                 validPartyACustomerForOrderActivate(contractInfoVo.getOneCustomerId());
-                contractPatch.setSignatureAppendix(Convert.toLong(bo.getOssId().trim()));
+                contractPatch.setSignatureAppendix(bo.getOssId().trim());
                 // contractPatch.setContractDeptId(bo.getDeptId());
                 contractPatch.setContractStatus(OAStatusEnum.ACTIVATE.getStatus());
             }