diff --git a/aio/iso.py b/aio/iso.py
index 63fbf0c..7dd73fa 100644
--- a/aio/iso.py
+++ b/aio/iso.py
@@ -158,6 +158,8 @@ def main(path, w2t):
     try:
         wb = load_workbook(path + "/iso-results.xlsx")
         ws = wb.active
+        for i in range(3, 50):
+            ws.cell(row=i, column=7).value = None
         tmpfile = f"{path}\\data.txt"
     except Exception as Err:
         w2t(f"发生错误：{Err}", 0, 2)