diff --git a/jlog/models.py b/jlog/models.py
index baaffb5a7..cf13a5354 100644
--- a/jlog/models.py
+++ b/jlog/models.py
@@ -8,7 +8,7 @@ class Log(models.Model):
     dept_name = models.CharField(max_length=20)
     log_path = models.CharField(max_length=100)
     start_time = models.DateTimeField(null=True)
-    pid = models.IntegerField(max_length=10)
+    pid = models.IntegerField()
     is_finished = models.BooleanField(default=False)
     handle_finished = models.BooleanField(default=False)
     end_time = models.DateTimeField(null=True)