diff --git a/src/Oms.Application/Dtos/Channels/KpiAreaInfoImportInput.cs b/src/Oms.Application/Dtos/Channels/KpiAreaInfoImportInput.cs
index a2e5388..a65be92 100644
--- a/src/Oms.Application/Dtos/Channels/KpiAreaInfoImportInput.cs
+++ b/src/Oms.Application/Dtos/Channels/KpiAreaInfoImportInput.cs
@@ -12,8 +12,19 @@ public class KpiAreaInfoImportInput
     /// </summary>
     public int AreaId { get; set; }
 
+    /// <summary>
+    /// 导入模式：incremental=增量（跳过重复）；full=全量（先清空本分区明细再导入）。
+    /// </summary>
+    public string ImportMode { get; set; } = ImportModes.Incremental;
+
     /// <summary>
     /// Excel 文件。
     /// </summary>
     public IFormFile File { get; set; } = null!;
+
+    public static class ImportModes
+    {
+        public const string Incremental = "incremental";
+        public const string Full = "full";
+    }
 }
diff --git a/src/Oms.Application/Services/Channels/KpiAreaService.cs b/src/Oms.Application/Services/Channels/KpiAreaService.cs
index ff902a5..95f6061 100644
--- a/src/Oms.Application/Services/Channels/KpiAreaService.cs
+++ b/src/Oms.Application/Services/Channels/KpiAreaService.cs
@@ -91,6 +91,7 @@ public class KpiAreaService : ApplicationService
     public async Task DeleteAsync(IdInput input)
     {
         var entity = await GetAreaOrThrowAsync(input.Id);
+        await KpiAreaRepository.DeleteInfosByAreaIdAsync(entity.Id);
         await KpiAreaRepository.DeleteAsync(entity);
     }
 
@@ -203,6 +204,7 @@ public class KpiAreaService : ApplicationService
         }
 
         await GetAreaOrThrowAsync(input.AreaId);
+        var importMode = NormalizeImportMode(input.ImportMode);
 
         await using var stream = input.File.OpenReadStream();
         var parsedRows = await KpiAreaInfoImportHelper.ParseImportRowsAsync(stream);
@@ -218,9 +220,16 @@ public class KpiAreaService : ApplicationService
             .ToDictionary(g => g.Key, g => g.First(), StringComparer.OrdinalIgnoreCase);
 
         var existingKeys = new HashSet<string>(StringComparer.Ordinal);
-        foreach (var item in await KpiAreaRepository.GetAllInfosByAreaIdAsync(input.AreaId))
+        if (importMode == KpiAreaInfoImportInput.ImportModes.Full)
         {
-            TryAddDuplicateKey(existingKeys, item);
+            await KpiAreaRepository.DeleteInfosByAreaIdAsync(input.AreaId);
+        }
+        else
+        {
+            foreach (var item in await KpiAreaRepository.GetAllInfosByAreaIdAsync(input.AreaId))
+            {
+                TryAddDuplicateKey(existingKeys, item);
+            }
         }
 
         var output = new KpiAreaInfoImportOutput();
@@ -236,7 +245,9 @@ public class KpiAreaService : ApplicationService
                     output.Failures.Add(new KpiAreaInfoImportFailRow
                     {
                         RowNumber = rowNumber,
-                        Reason = "与已有规则重复，已跳过"
+                        Reason = importMode == KpiAreaInfoImportInput.ImportModes.Full
+                            ? "文件内规则重复，已跳过"
+                            : "与已有规则重复，已跳过"
                     });
                     continue;
                 }
@@ -258,6 +269,18 @@ public class KpiAreaService : ApplicationService
         return output;
     }
 
+    private static string NormalizeImportMode(string? mode)
+    {
+        if (string.Equals(mode, KpiAreaInfoImportInput.ImportModes.Full, StringComparison.OrdinalIgnoreCase)
+            || string.Equals(mode, "全量", StringComparison.OrdinalIgnoreCase)
+            || string.Equals(mode, "replace", StringComparison.OrdinalIgnoreCase))
+        {
+            return KpiAreaInfoImportInput.ImportModes.Full;
+        }
+
+        return KpiAreaInfoImportInput.ImportModes.Incremental;
+    }
+
     private static Expression<Func<KpiArea, bool>> BuildAreaPredicate(KpiAreaListInput input)
     {
         var appKey = input.AppKey?.Trim();
diff --git a/src/Oms.Domain/ChannelsAggregate/Repositories/IKpiAreaRepository.cs b/src/Oms.Domain/ChannelsAggregate/Repositories/IKpiAreaRepository.cs
index 57db116..6dce96b 100644
--- a/src/Oms.Domain/ChannelsAggregate/Repositories/IKpiAreaRepository.cs
+++ b/src/Oms.Domain/ChannelsAggregate/Repositories/IKpiAreaRepository.cs
@@ -21,5 +21,7 @@ public interface IKpiAreaRepository : IRepository<KpiArea>, IKpiAreaPublishRepos
 
     Task DeleteInfoAsync(int id, CancellationToken cancellationToken = default);
 
+    Task DeleteInfosByAreaIdAsync(int areaId, CancellationToken cancellationToken = default);
+
     Task<List<KpiAreaInfo>> GetAllInfosByAreaIdAsync(int areaId, CancellationToken cancellationToken = default);
 }
diff --git a/src/Oms.SqlSugarCore/Channels/KpiAreaRepository.cs b/src/Oms.SqlSugarCore/Channels/KpiAreaRepository.cs
index 1099272..b06e0e4 100644
--- a/src/Oms.SqlSugarCore/Channels/KpiAreaRepository.cs
+++ b/src/Oms.SqlSugarCore/Channels/KpiAreaRepository.cs
@@ -57,6 +57,12 @@ public class KpiAreaRepository : OmsSqlSugarRepository<KpiArea>, IKpiAreaReposit
         await db.Deleteable<KpiAreaInfo>().Where(x => x.Id == id).ExecuteCommandAsync(cancellationToken);
     }
 
+    public async Task DeleteInfosByAreaIdAsync(int areaId, CancellationToken cancellationToken = default)
+    {
+        var db = await GetDbContextAsync(cancellationToken);
+        await db.Deleteable<KpiAreaInfo>().Where(x => x.AreaId == areaId).ExecuteCommandAsync(cancellationToken);
+    }
+
     public async Task<List<KpiAreaInfo>> GetAllInfosByAreaIdAsync(int areaId, CancellationToken cancellationToken = default)
     {
         var db = await GetDbContextAsync(cancellationToken);