diff --git a/lua/app/module/battle/controller/battle_base_controller.lua b/lua/app/module/battle/controller/battle_base_controller.lua
index 5c0bccb8..256c6ed4 100644
--- a/lua/app/module/battle/controller/battle_base_controller.lua
+++ b/lua/app/module/battle/controller/battle_base_controller.lua
@@ -343,8 +343,10 @@ function BattleBaseController:onLinkChange()
     end
 
     local elementTypeCount = 0
-    for element, count in pairs(dmgElementTypeMap) do
-        elementTypeCount = elementTypeCount + count
+    if dmgElementTypeMap then
+        for element, count in pairs(dmgElementTypeMap) do
+            elementTypeCount = elementTypeCount + count
+        end
     end
     local dmg = self:calExpectedInjury(mainElementType, elementTypeCount, dmgSkillId)
     local defMainUnitcomp = self:getCurOtherActionUnitComp()