diff --git a/src/main/java/com/docus/sw/fenpan/Document.java b/src/main/java/com/docus/sw/fenpan/Document.java
index 903c14e..93fdab1 100644
--- a/src/main/java/com/docus/sw/fenpan/Document.java
+++ b/src/main/java/com/docus/sw/fenpan/Document.java
@@ -24,8 +24,8 @@ public class Document {
     //写一个方法判断是 A3 还是 A4
 
     public Boolean isA3() {
-        if (width / dpi * 2.54 > Integer.parseInt(Config.getParam("a3.width"))
-                || longTh / dpi * 2.54 > Integer.parseInt(Config.getParam("a3.length"))) {
+        if (width / dpi > Integer.parseInt(Config.getParam("a3.width"))
+                || longTh / dpi > Integer.parseInt(Config.getParam("a3.length"))) {
             return true;
         }
         return false;