diff --git a/server/gameserver/car.cc b/server/gameserver/car.cc
index 0aa0d15..60399a2 100644
--- a/server/gameserver/car.cc
+++ b/server/gameserver/car.cc
@@ -5,20 +5,21 @@
 #include "room.h"
 #include "metamgr.h"
 #include "loot.h"
+#include "perfmonitor.h"
 
-Car::Car()
+Car::Car():MoveableEntity()
 {
-
+    ++PerfMonitor::Instance()->entity_num[ET_Car];
 }
 
 Car::~Car()
 {
-
+    --PerfMonitor::Instance()->entity_num[ET_Car];
 }
 
 void Car::Initialize()
 {
-
+    MoveableEntity::Initialize();
 }
 
 void Car::FillMFObjectPart(Room* room, Human* hum, cs::MFObjectPart* part_data)
@@ -95,11 +96,16 @@ void Car::GetOn(Human* passenger)
             return;
         }
     }
+    int seat = AllocSeat();
+    if (seat < 0) {
+        return;
+    }
     passengers_.insert(passenger);
     if (!driver_) {
         driver_ = passenger;
     }
     passenger->SetCar(this);
+    passenger->SetSeat(seat);
     passenger->SetPos(GetPos());
     {
         MetaData::Buff* buff_meta = MetaMgr::Instance()->GetBuff
@@ -118,3 +124,22 @@ void Car::GetOn(Human* passenger)
     room->frame_event.AddCarChg(passenger);
     SyncAroundPlayers(__FILE__, __LINE__, __func__);
 }
+
+int Car::AllocSeat()
+{
+    int seat = -1;
+    for (int i = 0; i < meta->int_param2; ++i) {
+        bool found = false;
+        for (auto hum : passengers_) {
+            if (hum->GetSeat() == i) {
+                found = true;
+                break;
+            }
+        }
+        if (!found) {
+            seat = i;
+            break;
+        }
+    }
+    return seat;
+}
diff --git a/server/gameserver/car.h b/server/gameserver/car.h
index 6c406ec..8ad9326 100644
--- a/server/gameserver/car.h
+++ b/server/gameserver/car.h
@@ -26,6 +26,9 @@ class Car : public MoveableEntity
     void GetDown(Human* passenger);
     void GetOn(Human* passenger);
 
+ private:
+    int AllocSeat();
+
  private:
     bool later_removed_ = false;
     Human* driver_ = nullptr;