diff --git a/submission/migrations/0006_submission_shared.py b/submission/migrations/0006_submission_shared.py
new file mode 100644
index 00000000..6d0b4a1a
--- /dev/null
+++ b/submission/migrations/0006_submission_shared.py
@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submission', '0005_submission_contest_id'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='submission',
+            name='shared',
+            field=models.BooleanField(default=False),
+        ),
+    ]
diff --git a/submission/models.py b/submission/models.py
index 6bb5991a..b28bd5ab 100644
--- a/submission/models.py
+++ b/submission/models.py
@@ -19,6 +19,8 @@ class Submission(models.Model):
     accepted_answer_time = models.IntegerField(blank=True, null=True)
     # 这个字段只有在题目是accepted 的时候才会用到，比赛题目的提交可能还会有得分等信息，存储在这里面
     accepted_answer_info = models.TextField(blank=True, null=True)
+    # 是否可以分享
+    shared = models.BooleanField(default=False)
 
     class Meta:
         db_table = "submission"