diff --git a/src/main/java/com/alibaba/excel/util/BooleanUtils.java b/src/main/java/com/alibaba/excel/util/BooleanUtils.java
index c09506b..55c48a1 100644
--- a/src/main/java/com/alibaba/excel/util/BooleanUtils.java
+++ b/src/main/java/com/alibaba/excel/util/BooleanUtils.java
@@ -8,7 +8,6 @@ package com.alibaba.excel.util;
 public class BooleanUtils {
 
     private static final String TRUE_NUMBER = "1";
-    private static final String FALSE_NUMBER = "0";
 
     private BooleanUtils() {}