diff --git a/server/gameserver/metadata.cc b/server/gameserver/metadata.cc
index 575a488..243a6ac 100644
--- a/server/gameserver/metadata.cc
+++ b/server/gameserver/metadata.cc
@@ -865,6 +865,43 @@ namespace MetaData
         return 0;
     }
 
+    void AirDrop::Init()
+    {
+        {
+            int total_weight = 0;
+            std::vector<std::string> strings;
+            a8::Split(i->drop_id(), strings, '|');
+            for (const std::string& str : strings) {
+                std::vector<std::string> strings2;
+                a8::Split(str, strings2, ':');
+                assert(strings2.size() == 2);
+                int drop_id = a8::XValue(strings2[0]);
+                int weight = a8::XValue(strings2[1]);
+                total_weight += weight;
+                drop.push_back
+                    (std::make_tuple(
+                                     drop_id,
+                                     total_weight
+                                     )
+                     );
+            }
+        }
+    }
+
+    int AirDrop::RandDrop()
+    {
+        if (HasDrop()) {
+            int total_weight = std::get<1>(drop[drop.size() - 1]);
+            int rnd = rand() % total_weight;
+            for (auto& tuple : drop) {
+                if (rnd < std::get<1>(tuple)) {
+                    return std::get<0>(tuple);
+                }
+            }
+        }
+        return 0;
+    }
+
     void AirRaid::Init()
     {
         {
diff --git a/server/gameserver/metadata.h b/server/gameserver/metadata.h
index 1de3438..89feb22 100644
--- a/server/gameserver/metadata.h
+++ b/server/gameserver/metadata.h
@@ -200,6 +200,11 @@ namespace MetaData
     struct AirDrop
     {
         const metatable::AirDrop* i = nullptr;
+        std::vector<std::tuple<int, int>> drop;
+        bool HasDrop() { return !drop.empty();};
+
+        void Init();
+        int RandDrop();
     };
 
     struct AirRaid
diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index e84f3b0..71d7456 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -1637,7 +1637,7 @@ void Room::InitAirDrop()
                      a8::XParams()
                      .SetSender(this)
                      .SetParam1(air_drop.i->appear_time())
-                     .SetParam2(air_drop.i->drop_id())
+                     .SetParam2(air_drop.RandDrop())
                      .SetParam3(air_drop.i->id()),
                      [] (const a8::XParams& param)
                      {
diff --git a/server/tools/protobuild/metatable.proto b/server/tools/protobuild/metatable.proto
index ed92562..a0ce3b6 100755
--- a/server/tools/protobuild/metatable.proto
+++ b/server/tools/protobuild/metatable.proto
@@ -326,7 +326,7 @@ message AirDrop
     optional int32 id = 1;
     optional int32 time = 2;
     optional int32 appear_time = 3;
-    optional int32 drop_id = 4;
+    optional string drop_id = 4;
 }
 
 message AirRaid