diff --git a/modules/caravan/api_buyorsell.go b/modules/caravan/api_buyorsell.go
index 5fb6104f0..cfe15cb48 100644
--- a/modules/caravan/api_buyorsell.go
+++ b/modules/caravan/api_buyorsell.go
@@ -51,8 +51,13 @@ func (this *apiComp) BuyOrSell(session comm.IUserSession, req *pb.CaravanBuyOrSe
 				continue
 			}
 			for _, k1 := range cityInfo.Like {
-				if k == k1 && v < caravan.Items[k].Count {
-					caravan.Items[k].Count -= v
+				if k == k1 {
+					if v < caravan.Items[k].Count {
+						caravan.Items[k].Count -= v
+					} else {
+						code = pb.ErrorCode_TrollSellMax // 卖出数量不足
+						return
+					}
 				}
 			}
 			// 找到城市想要收购的物品
@@ -94,6 +99,10 @@ func (this *apiComp) BuyOrSell(session comm.IUserSession, req *pb.CaravanBuyOrSe
 				}
 			}
 			caravan.Items[k].Count += v
+			if this.module.ArrayBag(caravan, upperLimit) { // 背包满了
+				code = pb.ErrorCode_TrollMaxItemCount
+				return
+			}
 			totla += price * v
 			caravan.Items[k].Price = totla / caravan.Items[k].Count
 			// 同步更新该城市的 出售货物信息
@@ -116,6 +125,7 @@ func (this *apiComp) BuyOrSell(session comm.IUserSession, req *pb.CaravanBuyOrSe
 		this.module.Errorf("获得虚拟币失败:%d", code)
 	}
 	update["item"] = caravan.Items
+	update["baglimit"] = caravan.Baglimit
 	this.module.modelCaravan.modifyCaravanDataByObjId(session.GetUserId(), update)
 	session.SendMsg(string(this.module.GetType()), "buyorsell", &pb.CaravanBuyOrSellResp{
 		Data: caravan,
diff --git a/modules/caravan/module.go b/modules/caravan/module.go
index 896d18fdb..c0a239fa3 100644
--- a/modules/caravan/module.go
+++ b/modules/caravan/module.go
@@ -299,3 +299,26 @@ func (this *Caravan) TaskComplete(session comm.IUserSession, taskid int32) {
 		}
 	}
 }
+
+// 整理背包 (true 表示背包装不下)
+func (this *Caravan) ArrayBag(data *pb.DBCaravan, limit int32) (bFull bool) {
+	var count int32
+	for k, v := range data.Items {
+		if v.Count == 0 {
+			delete(data.Items, k)
+		} else {
+			for {
+				count++
+				if v.Count > limit {
+					v.Count -= limit
+				} else {
+					break
+				}
+			}
+		}
+	}
+	if count > data.Baglimit {
+		return false
+	}
+	return true
+}