diff --git a/scripts/Statemachine/EntityBase.gd b/scripts/Statemachine/EntityBase.gd
index ad97296..5eea79f 100644
--- a/scripts/Statemachine/EntityBase.gd
+++ b/scripts/Statemachine/EntityBase.gd
@@ -249,7 +249,11 @@ func tryDie(by: BulletBase):
 	) or isBoss:
 		for i in randi_range(appleCount.x, appleCount.y):
 			ItemDropped.generate(ItemStore.ItemType.APPLE, 1, position + MathTool.randv2_range(GameRule.itemDroppedSpawnOffset))
-	ItemDropped.generate(ItemStore.ItemType.BEACHBALL, fields[FieldStore.Entity.MAX_HEALTH], position + MathTool.randv2_range(GameRule.itemDroppedSpawnOffset))
+	ItemDropped.generate(
+		ItemStore.ItemType.BEACHBALL,
+		fields[FieldStore.Entity.MAX_HEALTH] * randf_range(1 - GameRule.beachballOffset, 1 + GameRule.beachballOffset),
+		position + MathTool.randv2_range(GameRule.itemDroppedSpawnOffset)
+	)
 	EffectController.create(preload("res://components/Effects/DeadBlood.tscn"), texture.global_position).shot()
 	await die()
 	if isPlayer() and UIState.player == self:
diff --git a/scripts/Tools/GameRule.gd b/scripts/Tools/GameRule.gd
index be0a4a4..80498cd 100644
--- a/scripts/Tools/GameRule.gd
+++ b/scripts/Tools/GameRule.gd
@@ -11,11 +11,12 @@ enum Difficulty {
 static var difficulty: Difficulty = Difficulty.NORMAL # 难度倍数，可以写小数
 static var allowFriendlyFire: bool = false # 是否允许友军伤害
 static var bulletSpeedMultiplier: float = 1 # 子弹速度倍率
-static var damageOffset: float = MathTool.percent(20) # 伤害随机浮动比例，如20%即10的基础伤害会应用为8~12
+static var damageOffset: float = MathTool.percent(20) # 伤害随机浮动比例
+static var beachballOffset: float = MathTool.percent(30) # 棒球掉落数随机浮动比例
 static var damageLabelSpawnOffset: float = 10 # 伤害标签生成位置的随机偏移
 static var itemDroppedSpawnOffset: float = 30 # 掉落物生成位置的随机偏移
 static var appleDropRate: float = MathTool.percent(10) # 苹果掉落概率
-static var refreshCountIncreasePercent: Vector2 = Vector2(MathTool.percent(20), MathTool.percent(75)) # 刷新所需的棒球数量的增加的百分比
+static var refreshCountIncreasePercent: Vector2 = Vector2(MathTool.percent(10), MathTool.percent(50)) # 刷新所需的棒球数量的增加的百分比
 static var entityCountBoostPerWave: float = MathTool.percent(10) # 每波敌人数量增加的百分比，倍数级
 static var itemShowLifetime: int = 1500 # 物品展示组件如果设置了自动隐藏，那么隐藏前可以存活的时间
 static var tipSpawnRateWhenGetDroppedItem: float = MathTool.percent(25) # 当玩家获取到掉落物时，提示的概率