diff --git a/packages/components/select/src/useSelect.ts b/packages/components/select/src/useSelect.ts
index 2215bd742be58..758ab8b07fd51 100644
--- a/packages/components/select/src/useSelect.ts
+++ b/packages/components/select/src/useSelect.ts
@@ -341,14 +341,14 @@ export const useSelect = (props, states: States, ctx) => {
       const sizeInMap = getComponentSize(selectSize.value || elForm.size)
       // it's an inner input so reduce it by 2px.
       input.style.height = `${
-        states.selected.length === 0
+        (states.selected.length === 0
           ? sizeInMap
           : Math.max(
               _tags
                 ? _tags.clientHeight + (_tags.clientHeight > sizeInMap ? 6 : 0)
                 : 0,
               sizeInMap
-            ) - 2
+            )) - 2
       }px`
 
       states.tagInMultiLine = Number.parseFloat(input.style.height) >= sizeInMap