diff --git a/lua/app/module/battle/component/battle_unit_comp.lua b/lua/app/module/battle/component/battle_unit_comp.lua
index 6ba54273..1a38fb52 100644
--- a/lua/app/module/battle/component/battle_unit_comp.lua
+++ b/lua/app/module/battle/component/battle_unit_comp.lua
@@ -252,9 +252,14 @@ function BattleUnitComp:useAssistingSkill(count, delay, callback)
 		callback()
 		return
 	end
-	self.assistingDmgAddition = count
 	local attrName = GConst.MATCH_ATTACK_NAME[self:getMatchType()]
-	self.assistingDmgAddCount = self.unitEntity:addAttr(attrName, count*DEFAULT_FACTOR, true)
+	self.assistingDmgAddition = count - 1
+	if self.assistingDmgAddition <= 0 then
+		self.assistingDmgAddition = 0
+		self.assistingDmgAddCount = 0
+	else
+		self.assistingDmgAddCount = self.unitEntity:addAttr(attrName, self.assistingDmgAddition*DEFAULT_FACTOR, true)
+	end
 	self.actionOverCallback = callback
 	if delay > 0 then
 		self.waitTime = delay