diff --git a/tools/t7.py b/tools/t7.py
index 5c535a1..dafe016 100644
--- a/tools/t7.py
+++ b/tools/t7.py
@@ -245,7 +245,9 @@ class AutoLayout:
 
         # barcode有重复
         notrepeatbarcode = True
-        if self.chip_barcode_recode[chipname].intersection({item['barcode'] for item in library_data['data']}):
+        if self.chip_barcode_recode[chipname].intersection({item['barcode'] for item in library_data['data']}) or \
+                self.chip_barcode_recode[chipname].intersection(
+                    {'N' * 8 + item['i7'] for item in library_data['data']}):
             notrepeatbarcode = False
 
         # 互斥的文库