diff --git a/src/TrackCenter.Application/Dtos/Warning/Complete/GetPageCompleteWarningDetailsInput.cs b/src/TrackCenter.Application/Dtos/Warning/Complete/GetPageCompleteWarningDetailsInput.cs
index 3c397682..d5320c60 100644
--- a/src/TrackCenter.Application/Dtos/Warning/Complete/GetPageCompleteWarningDetailsInput.cs
+++ b/src/TrackCenter.Application/Dtos/Warning/Complete/GetPageCompleteWarningDetailsInput.cs
@@ -42,7 +42,7 @@ public class GetPageCompleteWarningDetailsInput : PageInfoInput
     /// <summary>
     /// 通知对象id
     /// </summary>
-    public int? NotifyUserId { get; set; }
+    public string? NotifyUserId { get; set; }
 
     /// <summary>
     /// 预警创建时间开始
diff --git a/src/TrackCenter.Application/Dtos/Warning/NotifyUserDto.cs b/src/TrackCenter.Application/Dtos/Warning/NotifyUserDto.cs
index aee75155..ba884f31 100644
--- a/src/TrackCenter.Application/Dtos/Warning/NotifyUserDto.cs
+++ b/src/TrackCenter.Application/Dtos/Warning/NotifyUserDto.cs
@@ -1,5 +1,6 @@
 using System.ComponentModel.DataAnnotations;
-using TrackCenter.Application.Dtos.Warning.DataAnnotations;
+using TrackCenter.Application.Dtos.Warning.Serialization;
+using System.Text.Json.Serialization;
 
 namespace TrackCenter.Application.Dtos.Warning;
 
@@ -8,8 +9,9 @@ public sealed class NotifyUserDto
 	/// <summary>
 	/// 用户id
 	/// </summary>
-	[IdRequired]
-	public int UserId { get; set; }
+	[Required]
+	[JsonConverter(typeof(FlexibleStringJsonConverter))]
+	public string UserId { get; set; } = string.Empty;
 
 	/// <summary>
 	/// 用户名
diff --git a/src/TrackCenter.Application/Dtos/Warning/Return/GetPageReturnWarningDetailsInput.cs b/src/TrackCenter.Application/Dtos/Warning/Return/GetPageReturnWarningDetailsInput.cs
index e7609916..0076b234 100644
--- a/src/TrackCenter.Application/Dtos/Warning/Return/GetPageReturnWarningDetailsInput.cs
+++ b/src/TrackCenter.Application/Dtos/Warning/Return/GetPageReturnWarningDetailsInput.cs
@@ -52,7 +52,7 @@ public class GetPageReturnWarningDetailsInput : PageInfoInput
     /// <summary>
     /// 通知对象用户id
     /// </summary>
-    public int? NotifyUserId { get; set; }
+    public string? NotifyUserId { get; set; }
 
     /// <summary>
     /// 轨迹发生时间开始
diff --git a/src/TrackCenter.Application/Dtos/Warning/Serialization/FlexibleStringJsonConverter.cs b/src/TrackCenter.Application/Dtos/Warning/Serialization/FlexibleStringJsonConverter.cs
new file mode 100644
index 00000000..62177bab
--- /dev/null
+++ b/src/TrackCenter.Application/Dtos/Warning/Serialization/FlexibleStringJsonConverter.cs
@@ -0,0 +1,44 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.Globalization;
+
+namespace TrackCenter.Application.Dtos.Warning.Serialization;
+
+/// <summary>
+/// 兼容 string/number 两种 token 读取为 string，避免历史数据反序列化失败。
+/// </summary>
+public sealed class FlexibleStringJsonConverter : JsonConverter<string>
+{
+    public override string Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    {
+        return reader.TokenType switch
+        {
+            JsonTokenType.String => reader.GetString() ?? string.Empty,
+            JsonTokenType.Number => ReadNumberAsString(ref reader),
+            JsonTokenType.True => bool.TrueString,
+            JsonTokenType.False => bool.FalseString,
+            JsonTokenType.Null => string.Empty,
+            _ => throw new JsonException("Only string/number/bool/null can be converted to string.")
+        };
+    }
+
+    public override void Write(Utf8JsonWriter writer, string value, JsonSerializerOptions options)
+    {
+        writer.WriteStringValue(value);
+    }
+
+    private static string ReadNumberAsString(ref Utf8JsonReader reader)
+    {
+        if (reader.TryGetInt64(out var longVal))
+        {
+            return longVal.ToString(CultureInfo.InvariantCulture);
+        }
+
+        if (reader.TryGetDecimal(out var decimalVal))
+        {
+            return decimalVal.ToString(CultureInfo.InvariantCulture);
+        }
+
+        return reader.GetDouble().ToString(CultureInfo.InvariantCulture);
+    }
+}
diff --git a/src/TrackCenter.Application/Dtos/Warning/Transport/GetPageTransportWarningDetailsInput.cs b/src/TrackCenter.Application/Dtos/Warning/Transport/GetPageTransportWarningDetailsInput.cs
index 553c6866..3e1e4629 100644
--- a/src/TrackCenter.Application/Dtos/Warning/Transport/GetPageTransportWarningDetailsInput.cs
+++ b/src/TrackCenter.Application/Dtos/Warning/Transport/GetPageTransportWarningDetailsInput.cs
@@ -41,7 +41,7 @@ public class GetPageTransportWarningDetailsInput : PageInfoInput
     /// <summary>
     /// 通知对象用户Id
     /// </summary>
-    public int? NotifyUserId { get; set; }
+    public string? NotifyUserId { get; set; }
 
     /// <summary>
     /// 创建时间开始
diff --git a/src/TrackCenter.Application/Hangfire/WarningNotifyAggregator.cs b/src/TrackCenter.Application/Hangfire/WarningNotifyAggregator.cs
index da71b1bf..55afb6d8 100644
--- a/src/TrackCenter.Application/Hangfire/WarningNotifyAggregator.cs
+++ b/src/TrackCenter.Application/Hangfire/WarningNotifyAggregator.cs
@@ -264,11 +264,14 @@ public sealed class WarningNotifyAggregator : ITransientDependency
 
         // 1.以人的维度对不同类别的预警通知分组聚合
         // key: userId value: {key:type,value:notify }
-        var userIdNotifyTaskDict = new Dictionary<int, Dictionary<int, List<WarningNotifyTaskEntity>>>();
+        var userIdNotifyTaskDict = new Dictionary<string, Dictionary<int, List<WarningNotifyTaskEntity>>>();
         foreach (var task in needNotifyTasks)
         {
             var notifyUsers = TextJsonHelper.Deserialize<List<NotifyUserDto>>(task.NotifyUsers)!;
-            var notifyUserIds = notifyUsers.Select(x => x.UserId).ToHashSet();
+            var notifyUserIds = notifyUsers
+                .Select(x => x.UserId.Trim())
+                .Where(x => !string.IsNullOrWhiteSpace(x))
+                .ToHashSet();
 
             foreach (var userId in notifyUserIds)
             {
@@ -303,7 +306,7 @@ public sealed class WarningNotifyAggregator : ITransientDependency
         return result;
     }
 
-    private WarningNotifyParam BuildNotifyParam(int userId, Dictionary<int, List<WarningNotifyTaskEntity>> typeNotifyTaskDict)
+    private WarningNotifyParam BuildNotifyParam(string userId, Dictionary<int, List<WarningNotifyTaskEntity>> typeNotifyTaskDict)
     {
         var options = _optionsMonitor.CurrentValue;
         var hours = options.ScanWarningNotifyTaskHourInterval;
diff --git a/src/TrackCenter.Application/Hangfire/WarningNotifyBuilder.cs b/src/TrackCenter.Application/Hangfire/WarningNotifyBuilder.cs
index 42913291..3a354e32 100644
--- a/src/TrackCenter.Application/Hangfire/WarningNotifyBuilder.cs
+++ b/src/TrackCenter.Application/Hangfire/WarningNotifyBuilder.cs
@@ -77,13 +77,14 @@ public static class WarningNotifyBuilder
         public const string ReturnPath = "/trajectoryCenter/trajectoryWarningOrder/ReturnWarning";
         public const string CompletePath = "/trajectoryCenter/trajectoryWarningOrder/CompleteWarning";
 
-        public static string BuildUrl(string baseUrl, WarningRuleType warningRuleType, int userId)
+        public static string BuildUrl(string baseUrl, WarningRuleType warningRuleType, string userId)
         {
+            var encodedUserId = Uri.EscapeDataString(userId);
             return warningRuleType switch
             {
-                WarningRuleType.运输时效预警 => $"{baseUrl}{TransportPath}?userid={userId}",
-                WarningRuleType.回传时效预警 => $"{baseUrl}{ReturnPath}?userid={userId}",
-                WarningRuleType.完整预警 => $"{baseUrl}{CompletePath}?userid={userId}",
+                WarningRuleType.运输时效预警 => $"{baseUrl}{TransportPath}?userid={encodedUserId}",
+                WarningRuleType.回传时效预警 => $"{baseUrl}{ReturnPath}?userid={encodedUserId}",
+                WarningRuleType.完整预警 => $"{baseUrl}{CompletePath}?userid={encodedUserId}",
                 _ => throw new ArgumentOutOfRangeException()
             };
         }
diff --git a/src/TrackCenter.Application/Hangfire/WarningNotifyParam.cs b/src/TrackCenter.Application/Hangfire/WarningNotifyParam.cs
index 433ce045..732946b7 100644
--- a/src/TrackCenter.Application/Hangfire/WarningNotifyParam.cs
+++ b/src/TrackCenter.Application/Hangfire/WarningNotifyParam.cs
@@ -5,7 +5,7 @@ namespace TrackCenter.Application.Hangfire;
 /// </summary>
 public class WarningNotifyParam
 {
-    public int UserId { get; set; }
+    public string UserId { get; set; } = string.Empty;
 
     public int Hours { get; set; }
 
diff --git a/src/TrackCenter.Domain/Dtos/Warning/GetPageCompleteWarningDetailsInputVO.cs b/src/TrackCenter.Domain/Dtos/Warning/GetPageCompleteWarningDetailsInputVO.cs
index fad24a15..1757fe88 100644
--- a/src/TrackCenter.Domain/Dtos/Warning/GetPageCompleteWarningDetailsInputVO.cs
+++ b/src/TrackCenter.Domain/Dtos/Warning/GetPageCompleteWarningDetailsInputVO.cs
@@ -36,7 +36,7 @@ public class GetPageCompleteWarningDetailsInputVO : PageInfoInput
     /// <summary>
     /// 通知对象id
     /// </summary>
-    public int? NotifyUserId { get; set; }
+    public string? NotifyUserId { get; set; }
 
     /// <summary>
     /// 预警创建时间开始
diff --git a/src/TrackCenter.Domain/Dtos/Warning/GetPageReturnWarningDetailsInputVO.cs b/src/TrackCenter.Domain/Dtos/Warning/GetPageReturnWarningDetailsInputVO.cs
index b1c0201f..e04f857d 100644
--- a/src/TrackCenter.Domain/Dtos/Warning/GetPageReturnWarningDetailsInputVO.cs
+++ b/src/TrackCenter.Domain/Dtos/Warning/GetPageReturnWarningDetailsInputVO.cs
@@ -49,7 +49,7 @@ public class GetPageReturnWarningDetailsInputVO : PageInfoInput
     /// <summary>
     /// 通知对象用户id
     /// </summary>
-    public int? NotifyUserId { get; set; }
+    public string? NotifyUserId { get; set; }
 
     /// <summary>
     /// 轨迹发生时间开始
diff --git a/src/TrackCenter.Domain/Dtos/Warning/GetPageTransportWarningDetailsInputVO.cs b/src/TrackCenter.Domain/Dtos/Warning/GetPageTransportWarningDetailsInputVO.cs
index a4aa202a..92ccd428 100644
--- a/src/TrackCenter.Domain/Dtos/Warning/GetPageTransportWarningDetailsInputVO.cs
+++ b/src/TrackCenter.Domain/Dtos/Warning/GetPageTransportWarningDetailsInputVO.cs
@@ -38,7 +38,7 @@ public class GetPageTransportWarningDetailsInputVO : PageInfoInput
     /// <summary>
     /// 通知对象用户Id
     /// </summary>
-    public int? NotifyUserId { get; set; }
+    public string? NotifyUserId { get; set; }
 
     /// <summary>
     /// 创建时间开始
diff --git a/src/TrackCenter.Repository/Repositories/WarningDetailsEsRepository.cs b/src/TrackCenter.Repository/Repositories/WarningDetailsEsRepository.cs
index 10c7028a..fcb6b327 100644
--- a/src/TrackCenter.Repository/Repositories/WarningDetailsEsRepository.cs
+++ b/src/TrackCenter.Repository/Repositories/WarningDetailsEsRepository.cs
@@ -46,8 +46,8 @@ public class WarningDetailsEsRepository : IWarningDetailsEsRepository, ITransien
             c => c.DateRange(r => r.Field(f => f.CreateTime).LessThanOrEquals(input.CreateTimeEnd)));
 
         // 模糊匹配userId
-        musts.AddIf(x => x.NotifyUserId.HasValue,
-            c => c.Match(f => f.Field(d => d.NotifyUsers).Query(input.NotifyUserId.ToString())));
+        musts.AddIf(x => !string.IsNullOrWhiteSpace(x.NotifyUserId),
+            c => c.Match(f => f.Field(d => d.NotifyUsers).Query(input.NotifyUserId)));
 
         var r = await _client.SearchAsync<TransportWarningDetailsIndex>(x => x
             .Index(GlobalConst.TransportWarningDetailsIndex)
@@ -381,8 +381,8 @@ public class WarningDetailsEsRepository : IWarningDetailsEsRepository, ITransien
             c => c.DateRange(r => r.Field(f => f.CreateTime).LessThanOrEquals(input.WarningCreateTimeEnd)));
 
         // 模糊匹配userId（json字符串包含userId）
-        musts.AddIf(x => x.NotifyUserId.HasValue,
-            c => c.Match(f => f.Field(d => d.NotifyUsers).Query(input.NotifyUserId.ToString())));
+        musts.AddIf(x => !string.IsNullOrWhiteSpace(x.NotifyUserId),
+            c => c.Match(f => f.Field(d => d.NotifyUsers).Query(input.NotifyUserId)));
         musts.AddIf(x => !string.IsNullOrWhiteSpace(x.Customer),
             c => c.Match(f => f.Field(d => d.Customer).Query(input.Customer)));
 
@@ -753,8 +753,8 @@ public class WarningDetailsEsRepository : IWarningDetailsEsRepository, ITransien
             c => c.DateRange(r => r.Field(f => f.ProcessedTime).LessThanOrEquals(input.WarningHandleTimeEnd)));
 
         // 模糊匹配userId
-        musts.AddIf(x => x.NotifyUserId.HasValue,
-            c => c.Match(f => f.Field(d => d.NotifyUsers).Query(input.NotifyUserId.ToString())));
+        musts.AddIf(x => !string.IsNullOrWhiteSpace(x.NotifyUserId),
+            c => c.Match(f => f.Field(d => d.NotifyUsers).Query(input.NotifyUserId)));
 
         musts.AddIf(x => !string.IsNullOrWhiteSpace(x.Customer),
             c => c.Match(f => f.Field(d => d.Customer).Query(input.Customer)));