diff --git a/src/adv/Adv.lua b/src/adv/Adv.lua
index d607260..7fa2a4e 100644
--- a/src/adv/Adv.lua
+++ b/src/adv/Adv.lua
@@ -1817,6 +1817,11 @@ function Adv:enemyDead(enemy, escape)
 					block:clear()
 					self.battle.player:triggerPassive(Passive.BATTLE_WIN)
 				else
+					local buff = enemy:hadBuff(Buff.DROP_BUFF_BY_ENEMY)  -- 根据敌人数量变化个数
+					if buff then 
+						local team = enemy:getTeam(1, true)
+						item[2] = math.floor(item[2] * (1 + 0.2 * #team))
+					end
 					block:updateEvent({
 						etype = AdvEventType.Drop,
 						item = item
diff --git a/src/adv/AdvBuff.lua b/src/adv/AdvBuff.lua
index 44ad345..5bef3a3 100644
--- a/src/adv/AdvBuff.lua
+++ b/src/adv/AdvBuff.lua
@@ -33,6 +33,7 @@ Buff.ITEM_GET_UP = 29 -- 获得道具数量增加
 Buff.Buff_EFFECT_CHANGE = 30 -- 改变 buff 效果
 Buff.Buff_NO_PASSIVE_MONSTER = 31 -- 地图被动刷新不出来怪物
 Buff.SNEAK = 32 --潜行
+Buff.DROP_BUFF_BY_ENEMY = 33 -- 怪物掉落加成  -- 怪物使用
 
 
 --角色一些属性的变化
--
libgit2 0.21.2