diff --git a/src/Luban.Job.Cfg/Source/Defs/DefTable.cs b/src/Luban.Job.Cfg/Source/Defs/DefTable.cs
index 3920035..6d1a6df 100644
--- a/src/Luban.Job.Cfg/Source/Defs/DefTable.cs
+++ b/src/Luban.Job.Cfg/Source/Defs/DefTable.cs
@@ -8,6 +8,8 @@ using System.Linq;
 
 namespace Luban.Job.Cfg.Defs
 {
+    public record class IndexInfo(TType Type, DefField IndexField, int IndexFieldIdIndex);
+
     public class DefTable : CfgDefTypeBase
     {
         private static readonly NLog.Logger s_logger = NLog.LogManager.GetCurrentClassLogger();
@@ -62,7 +64,7 @@ namespace Luban.Job.Cfg.Defs
 
         public bool IsUnionIndex { get; private set; }
 
-        public List<(TType Type, DefField IndexField, int IndexFieldIdIndex)> IndexList { get; } = new();
+        public List<IndexInfo> IndexList { get; } = new();
 
         public bool NeedExport => Assembly.NeedExport(this.Groups);
 
@@ -139,7 +141,7 @@ namespace Luban.Job.Cfg.Defs
                         {
                             IndexField = f;
                             IndexFieldIdIndex = i;
-                            this.IndexList.Add((f.CType, f, i));
+                            this.IndexList.Add(new IndexInfo(f.CType, f, i));
                         }
                         else
                         {
diff --git a/src/Luban.Job.Cfg/Source/Utils/TTypeTemplateExtends.cs b/src/Luban.Job.Cfg/Source/Utils/TTypeTemplateExtends.cs
index 4fb3ee1..91636ef 100644
--- a/src/Luban.Job.Cfg/Source/Utils/TTypeTemplateExtends.cs
+++ b/src/Luban.Job.Cfg/Source/Utils/TTypeTemplateExtends.cs
@@ -4,6 +4,7 @@ using Luban.Job.Common.Defs;
 using Luban.Job.Common.Types;
 using Luban.Job.Common.TypeVisitors;
 using System;
+using System.Linq;
 
 namespace Luban.Job.Cfg.Utils
 {
@@ -207,6 +208,26 @@ namespace Luban.Job.Cfg.Utils
             return type.Apply(RustJsonConstructorVisitor.Ins, jsonFieldName);
         }
 
+        public static string CsTableUnionMapTypeName(DefTable table)
+        {
+            return $"Dictionary<({string.Join(", ", table.IndexList.Select(idx => CsDefineType(idx.Type)))}), {CsDefineType(table.ValueTType)}>";
+        }
+
+        public static string CsTableKeyList(DefTable table, string varName)
+        {
+            return string.Join(", ", table.IndexList.Select(idx => $"{varName}.{idx.IndexField.ConventionName}"));
+        }
+
+        public static string CsTableGetParamDefList(DefTable table)
+        {
+            return string.Join(", ", table.IndexList.Select(idx => $"{CsDefineType(idx.Type)} {idx.IndexField.Name}"));
+        }
+
+        public static string CsTableGetParamNameList(DefTable table)
+        {
+            return string.Join(", ", table.IndexList.Select(idx => $"{idx.IndexField.Name}"));
+        }
+
         //public static string DeserializeTextKeyField(DefField field, string lan, string bufName)
         //{
         //    switch (lan)
diff --git a/src/Luban.Server/Templates/config/cs_bin/table.tpl b/src/Luban.Server/Templates/config/cs_bin/table.tpl
index 0bf7a7f..94958e1 100644
--- a/src/Luban.Server/Templates/config/cs_bin/table.tpl
+++ b/src/Luban.Server/Templates/config/cs_bin/table.tpl
@@ -63,7 +63,15 @@ public sealed class {{name}}
     }
         {{~else if x.is_list_table ~}}
     private readonly List<{{cs_define_type value_type}}> _dataList;
-    
+
+    {{~if x.is_union_index~}}
+    private {{cs_table_union_map_type_name x}} _dataMapUnion;
+    {{~else if !x.index_list.empty?~}}
+    {{~for idx in x.index_list~}}
+    private Dictionary<{{cs_define_type idx.type}}, {{cs_define_type value_type}}> _dataMap_{{idx.index_field.name}};
+    {{~end~}}
+    {{~end~}}
+
     public {{name}}(ByteBuf _buf)
     {
         _dataList = new List<{{cs_define_type value_type}}>();
@@ -74,12 +82,34 @@ public sealed class {{name}}
             {{cs_deserialize '_buf' '_v' value_type}}
             _dataList.Add(_v);
         }
+    {{~if x.is_union_index~}}
+        _dataMapUnion = new {{cs_table_union_map_type_name x}}();
+        foreach(var _v in _dataList)
+        {
+            _dataMapUnion.Add(({{cs_table_key_list x "_v"}}), _v);
+        }
+    {{~else if !x.index_list.empty?~}}
+    {{~for idx in x.index_list~}}
+        _dataMap_{{idx.index_field.name}} = new Dictionary<{{cs_define_type idx.type}}, {{cs_define_type value_type}}>();
+    {{~end~}}
+    foreach(var _v in _dataList)
+    {
+    {{~for idx in x.index_list~}}
+        _dataMap_{{idx.index_field.name}}.Add(_v.{{idx.index_field.convention_name}}, _v);
+    {{~end~}}
+    }
+    {{~end~}}
     }
 
     public List<{{cs_define_type value_type}}> DataList => _dataList;
 
-    public {{cs_define_type value_type}} Get(int index) => _dataList[index];
-    public {{cs_define_type value_type}} this[int index] => _dataList[index];
+    {{~if x.is_union_index~}}
+    public {{cs_define_type value_type}} Get({{cs_table_get_param_def_list x}}) => _dataMapUnion.TryGetValue(({{cs_table_get_param_name_list x}}), out {{cs_define_type value_type}} __v) ? __v : null;
+    {{~else if !x.index_list.empty? ~}}
+        {{~for idx in x.index_list~}}
+    public {{cs_define_type value_type}} GetBy{{idx.index_field.convention_name}}({{cs_define_type idx.type}} key) => _dataMap_{{idx.index_field.name}}.TryGetValue(key, out {{cs_define_type value_type}} __v) ? __v : null;
+        {{~end~}}
+    {{~end~}}
 
     public void Resolve(Dictionary<string, object> _tables)
     {
diff --git a/src/Luban.Server/Templates/config/cs_json/table.tpl b/src/Luban.Server/Templates/config/cs_json/table.tpl
index 8c0beac..e5b875d 100644
--- a/src/Luban.Server/Templates/config/cs_json/table.tpl
+++ b/src/Luban.Server/Templates/config/cs_json/table.tpl
@@ -66,6 +66,14 @@ public sealed class {{name}}
     
         {{~else if x.is_list_table ~}}
     private readonly List<{{cs_define_type value_type}}> _dataList;
+
+    {{~if x.is_union_index~}}
+    private {{cs_table_union_map_type_name x}} _dataMapUnion;
+    {{~else if !x.index_list.empty?~}}
+    {{~for idx in x.index_list~}}
+    private Dictionary<{{cs_define_type idx.type}}, {{cs_define_type value_type}}> _dataMap_{{idx.index_field.name}};
+    {{~end~}}
+    {{~end~}}
     
     public {{name}}(JsonElement _json)
     {
@@ -76,12 +84,34 @@ public sealed class {{name}}
             var _v = {{cs_define_type value_type}}.Deserialize{{value_type.bean.name}}(_row);
             _dataList.Add(_v);
         }
+    {{~if x.is_union_index~}}
+        _dataMapUnion = new {{cs_table_union_map_type_name x}}();
+        foreach(var _v in _dataList)
+        {
+            _dataMapUnion.Add(({{cs_table_key_list x "_v"}}), _v);
+        }
+    {{~else if !x.index_list.empty?~}}
+    {{~for idx in x.index_list~}}
+        _dataMap_{{idx.index_field.name}} = new Dictionary<{{cs_define_type idx.type}}, {{cs_define_type value_type}}>();
+    {{~end~}}
+    foreach(var _v in _dataList)
+    {
+    {{~for idx in x.index_list~}}
+        _dataMap_{{idx.index_field.name}}.Add(_v.{{idx.index_field.convention_name}}, _v);
+    {{~end~}}
+    }
+    {{~end~}}
     }
 
     public List<{{cs_define_type value_type}}> DataList => _dataList;
 
-    public {{cs_define_type value_type}} Get(int index) => _dataList[index];
-    public {{cs_define_type value_type}} this[int index] => _dataList[index];
+    {{~if x.is_union_index~}}
+    public {{cs_define_type value_type}} Get({{cs_table_get_param_def_list x}}) => _dataMapUnion.TryGetValue(({{cs_table_get_param_name_list x}}), out {{cs_define_type value_type}} __v) ? __v : null;
+    {{~else if !x.index_list.empty? ~}}
+        {{~for idx in x.index_list~}}
+    public {{cs_define_type value_type}} GetBy{{idx.index_field.convention_name}}({{cs_define_type idx.type}} key) => _dataMap_{{idx.index_field.name}}.TryGetValue(key, out {{cs_define_type value_type}} __v) ? __v : null;
+        {{~end~}}
+    {{~end~}}
 
     public void Resolve(Dictionary<string, object> _tables)
     {
diff --git a/src/Luban.Server/Templates/config/cs_unity_json/table.tpl b/src/Luban.Server/Templates/config/cs_unity_json/table.tpl
index d9dc539..b6940ad 100644
--- a/src/Luban.Server/Templates/config/cs_unity_json/table.tpl
+++ b/src/Luban.Server/Templates/config/cs_unity_json/table.tpl
@@ -67,6 +67,14 @@ public sealed class {{name}}
         {{~else if x.is_list_table ~}}
     private readonly List<{{cs_define_type value_type}}> _dataList;
     
+    {{~if x.is_union_index~}}
+    private {{cs_table_union_map_type_name x}} _dataMapUnion;
+    {{~else if !x.index_list.empty?~}}
+    {{~for idx in x.index_list~}}
+    private Dictionary<{{cs_define_type idx.type}}, {{cs_define_type value_type}}> _dataMap_{{idx.index_field.name}};
+    {{~end~}}
+    {{~end~}}
+
     public {{name}}(JSONNode _json)
     {
         _dataList = new List<{{cs_define_type value_type}}>();
@@ -76,12 +84,34 @@ public sealed class {{name}}
             var _v = {{cs_define_type value_type}}.Deserialize{{value_type.bean.name}}(_row);
             _dataList.Add(_v);
         }
+    {{~if x.is_union_index~}}
+        _dataMapUnion = new {{cs_table_union_map_type_name x}}();
+        foreach(var _v in _dataList)
+        {
+            _dataMapUnion.Add(({{cs_table_key_list x "_v"}}), _v);
+        }
+    {{~else if !x.index_list.empty?~}}
+    {{~for idx in x.index_list~}}
+        _dataMap_{{idx.index_field.name}} = new Dictionary<{{cs_define_type idx.type}}, {{cs_define_type value_type}}>();
+    {{~end~}}
+    foreach(var _v in _dataList)
+    {
+    {{~for idx in x.index_list~}}
+        _dataMap_{{idx.index_field.name}}.Add(_v.{{idx.index_field.convention_name}}, _v);
+    {{~end~}}
+    }
+    {{~end~}}
     }
 
     public List<{{cs_define_type value_type}}> DataList => _dataList;
 
-    public {{cs_define_type value_type}} Get(int index) => _dataList[index];
-    public {{cs_define_type value_type}} this[int index] => _dataList[index];
+    {{~if x.is_union_index~}}
+    public {{cs_define_type value_type}} Get({{cs_table_get_param_def_list x}}) => _dataMapUnion.TryGetValue(({{cs_table_get_param_name_list x}}), out {{cs_define_type value_type}} __v) ? __v : null;
+    {{~else if !x.index_list.empty? ~}}
+        {{~for idx in x.index_list~}}
+    public {{cs_define_type value_type}} GetBy{{idx.index_field.convention_name}}({{cs_define_type idx.type}} key) => _dataMap_{{idx.index_field.name}}.TryGetValue(key, out {{cs_define_type value_type}} __v) ? __v : null;
+        {{~end~}}
+    {{~end~}}
 
     public void Resolve(Dictionary<string, object> _tables)
     {