diff --git a/src/WMS.Web.Api/wwwroot/WMS.Web.Domain.xml b/src/WMS.Web.Api/wwwroot/WMS.Web.Domain.xml
index 2d27d07a..a96ccf7f 100644
--- a/src/WMS.Web.Api/wwwroot/WMS.Web.Domain.xml
+++ b/src/WMS.Web.Api/wwwroot/WMS.Web.Domain.xml
@@ -14,6 +14,11 @@
             ID
             </summary>
         </member>
+        <member name="P:WMS.Web.Domain.Entitys.BackRecord.BillNo">
+            <summary>
+            单据编号
+            </summary>
+        </member>
         <member name="P:WMS.Web.Domain.Entitys.BackRecord.Type">
             <summary>
             类型：1为入库回退下架，2为出库回退上架
@@ -40,6 +45,11 @@
             </summary>
             <param name="creatorId"></param>
         </member>
+        <member name="M:WMS.Web.Domain.Entitys.BackRecord.GenerateNo">
+            <summary>
+            生成单据号
+            </summary>
+        </member>
         <member name="T:WMS.Web.Domain.Entitys.BackRecordDetails">
             <summary>
             wms出入库回退记录表
diff --git a/src/WMS.Web.Domain/Entitys/BackRecord.cs b/src/WMS.Web.Domain/Entitys/BackRecord.cs
index e98039e5..23af8d73 100644
--- a/src/WMS.Web.Domain/Entitys/BackRecord.cs
+++ b/src/WMS.Web.Domain/Entitys/BackRecord.cs
@@ -16,7 +16,11 @@ namespace WMS.Web.Domain.Entitys
         /// <summary>
         /// ID
         /// </summary>
-        public int Id { get; set; }        
+        public int Id { get; set; }
+        /// <summary>
+        /// 单据编号
+        /// </summary>
+        public string BillNo { get; set; }
         /// <summary>
         /// 类型：1为入库回退下架，2为出库回退上架
         /// </summary>
@@ -44,5 +48,28 @@ namespace WMS.Web.Domain.Entitys
             this.CreatorId = creatorId;
             this.CreateTime = DateTime.Now;
         }
+
+        /// <summary>
+        /// 生成单据号
+        /// </summary>
+        public void GenerateNo()
+        {
+            //用户手动输入了 就不自动生成了
+            if (!string.IsNullOrEmpty(this.BillNo)) return;
+
+            if (this.Id.ToString().Length >= 8)
+            {
+                this.BillNo = "CR" + this.Id.ToString();
+                return;
+            }
+
+            string idStr = this.Id.ToString();
+            while (true)
+            {
+                idStr = "0" + idStr;
+                if (idStr.Length >= 8) break;
+            }
+            this.BillNo = "CR" + idStr;
+        }
     }
 }
diff --git a/src/WMS.Web.Repositories/BackRecordRepositories.cs b/src/WMS.Web.Repositories/BackRecordRepositories.cs
index e5be5710..3475cdb3 100644
--- a/src/WMS.Web.Repositories/BackRecordRepositories.cs
+++ b/src/WMS.Web.Repositories/BackRecordRepositories.cs
@@ -106,6 +106,12 @@ namespace WMS.Web.Repositories
             {
                 await _context.BackRecord.AddAsync(entity);
                 await _context.SaveChangesAsync();
+                if (string.IsNullOrEmpty(entity.BillNo))
+                {
+                    entity.GenerateNo();
+                    await _context.SaveChangesAsync();
+                }
+
                 if (_transaction != null)
                     _transaction.Commit();
                 return entity;