diff --git a/database/blacklist.py b/database/blacklist.py
new file mode 100644
index 0000000..7399634
--- /dev/null
+++ b/database/blacklist.py
@@ -0,0 +1,15 @@
+from typing import Optional
+from sqlmodel import Field, SQLModel
+import datetime
+
+
+class BlacklistBase(SQLModel):
+    handle: str
+
+
+class Blacklist(BlacklistBase, table=True):
+    id: int | None = Field(default=None, primary_key=True)
+
+
+class BlacklistCreate(BlacklistBase):
+    pass
\ No newline at end of file
diff --git a/main.py b/main.py
index 9c3bfa4..85ff721 100644
--- a/main.py
+++ b/main.py
@@ -4,6 +4,7 @@ from typing import Annotated
 import datetime, re
 
 from database.feed import Feed, FeedCreate, FeedPublic, FeedUpdate
+from database.blacklist import Blacklist, BlacklistCreate
 from utils.feed_generator import generate_feed_of_user, USER_NOT_FOUND, CANNOT_ACCESS_INSTANCE
 from utils.database import get_session, create_db_and_tables
 
@@ -23,6 +24,11 @@ def get_feed_of_user(user_handle: str, session: SessionDep):
     if re.match(HANDLE_PATTERN, user_handle) is None:
         return HTTPException(status_code=400, detail="The handle is invalid.")
 
+    # check if there is the user in blacklist
+    black_user = session.exec(select(Blacklist).where(Blacklist.handle == user_handle)).first
+    if black_user:
+        return HTTPException(status_code=401, detail="The user is in blacklist.")
+
     # get feed on database
     feed_db = session.exec(select(Feed).where(Feed.handle == user_handle)).first()