diff --git a/api/events/event_handlers/clean_when_document_deleted.py b/api/events/event_handlers/clean_when_document_deleted.py
index d0bec667a9..24022da15f 100644
--- a/api/events/event_handlers/clean_when_document_deleted.py
+++ b/api/events/event_handlers/clean_when_document_deleted.py
@@ -7,4 +7,5 @@ def handle(sender, **kwargs):
     document_id = sender
     dataset_id = kwargs.get('dataset_id')
     doc_form = kwargs.get('doc_form')
-    clean_document_task.delay(document_id, dataset_id, doc_form)
+    file_id = kwargs.get('file_id')
+    clean_document_task.delay(document_id, dataset_id, doc_form, file_id)
diff --git a/api/services/dataset_service.py b/api/services/dataset_service.py
index fbaf44c9a4..3d9f1851b7 100644
--- a/api/services/dataset_service.py
+++ b/api/services/dataset_service.py
@@ -524,7 +524,14 @@ class DocumentService:
     @staticmethod
     def delete_document(document):
         # trigger document_was_deleted signal
-        document_was_deleted.send(document.id, dataset_id=document.dataset_id, doc_form=document.doc_form)
+        file_id = None
+        if document.data_source_type == 'upload_file':
+            if document.data_source_info:
+                data_source_info = document.data_source_info_dict
+                if data_source_info and 'upload_file_id' in data_source_info:
+                    file_id = data_source_info['upload_file_id']
+        document_was_deleted.send(document.id, dataset_id=document.dataset_id,
+                                  doc_form=document.doc_form, file_id=file_id)
 
         db.session.delete(document)
         db.session.commit()
diff --git a/api/tasks/clean_dataset_task.py b/api/tasks/clean_dataset_task.py
index 4de587d26a..1f26c966c4 100644
--- a/api/tasks/clean_dataset_task.py
+++ b/api/tasks/clean_dataset_task.py
@@ -6,6 +6,7 @@ from celery import shared_task
 
 from core.rag.index_processor.index_processor_factory import IndexProcessorFactory
 from extensions.ext_database import db
+from extensions.ext_storage import storage
 from models.dataset import (
     AppDatasetJoin,
     Dataset,
@@ -14,6 +15,7 @@ from models.dataset import (
     Document,
     DocumentSegment,
 )
+from models.model import UploadFile
 
 
 # Add import statement for ValueError
@@ -65,8 +67,27 @@ def clean_dataset_task(dataset_id: str, tenant_id: str, indexing_technique: str,
         db.session.query(DatasetQuery).filter(DatasetQuery.dataset_id == dataset_id).delete()
         db.session.query(AppDatasetJoin).filter(AppDatasetJoin.dataset_id == dataset_id).delete()
 
-        db.session.commit()
+        # delete files
+        if documents:
+            for document in documents:
+                try:
+                    if document.data_source_type == 'upload_file':
+                        if document.data_source_info:
+                            data_source_info = document.data_source_info_dict
+                            if data_source_info and 'upload_file_id' in data_source_info:
+                                file_id = data_source_info['upload_file_id']
+                                file = db.session.query(UploadFile).filter(
+                                    UploadFile.tenant_id == document.tenant_id,
+                                    UploadFile.id == file_id
+                                ).first()
+                                if not file:
+                                    continue
+                                storage.delete(file.key)
+                                db.session.delete(file)
+                except Exception:
+                    continue
 
+        db.session.commit()
         end_at = time.perf_counter()
         logging.info(
             click.style('Cleaned dataset when dataset deleted: {} latency: {}'.format(dataset_id, end_at - start_at), fg='green'))
diff --git a/api/tasks/clean_document_task.py b/api/tasks/clean_document_task.py
index 71ebad1da4..0fd05615b6 100644
--- a/api/tasks/clean_document_task.py
+++ b/api/tasks/clean_document_task.py
@@ -1,21 +1,25 @@
 import logging
 import time
+from typing import Optional
 
 import click
 from celery import shared_task
 
 from core.rag.index_processor.index_processor_factory import IndexProcessorFactory
 from extensions.ext_database import db
+from extensions.ext_storage import storage
 from models.dataset import Dataset, DocumentSegment
+from models.model import UploadFile
 
 
 @shared_task(queue='dataset')
-def clean_document_task(document_id: str, dataset_id: str, doc_form: str):
+def clean_document_task(document_id: str, dataset_id: str, doc_form: str, file_id: Optional[str]):
     """
     Clean document when document deleted.
     :param document_id: document id
     :param dataset_id: dataset id
     :param doc_form: doc_form
+    :param file_id: file id
 
     Usage: clean_document_task.delay(document_id, dataset_id)
     """
@@ -39,8 +43,20 @@ def clean_document_task(document_id: str, dataset_id: str, doc_form: str):
                 db.session.delete(segment)
 
             db.session.commit()
-            end_at = time.perf_counter()
-            logging.info(
-                click.style('Cleaned document when document deleted: {} latency: {}'.format(document_id, end_at - start_at), fg='green'))
+        if file_id:
+            file = db.session.query(UploadFile).filter(
+                UploadFile.id == file_id
+            ).first()
+            if file:
+                try:
+                    storage.delete(file.key)
+                except Exception:
+                    logging.exception("Delete file failed when document deleted, file_id: {}".format(file_id))
+                db.session.delete(file)
+                db.session.commit()
+
+        end_at = time.perf_counter()
+        logging.info(
+            click.style('Cleaned document when document deleted: {} latency: {}'.format(document_id, end_at - start_at), fg='green'))
     except Exception:
         logging.exception("Cleaned document when document deleted failed")