diff --git a/api/services/dataset_service.py b/api/services/dataset_service.py
index 970192fde5..ac4b25c5dc 100644
--- a/api/services/dataset_service.py
+++ b/api/services/dataset_service.py
@@ -3458,7 +3458,7 @@ class SegmentService:
         if keyword:
             query = query.where(DocumentSegment.content.ilike(f"%{keyword}%"))
 
-        query = query.order_by(DocumentSegment.position.asc())
+        query = query.order_by(DocumentSegment.position.asc(), DocumentSegment.id.asc())
         paginated_segments = db.paginate(select=query, page=page, per_page=limit, max_per_page=100, error_out=False)
 
         return paginated_segments.items, paginated_segments.total
diff --git a/api/tests/unit_tests/services/test_dataset_service_get_segments.py b/api/tests/unit_tests/services/test_dataset_service_get_segments.py
new file mode 100644
index 0000000000..360c8a3c7d
--- /dev/null
+++ b/api/tests/unit_tests/services/test_dataset_service_get_segments.py
@@ -0,0 +1,472 @@
+"""
+Unit tests for SegmentService.get_segments method.
+
+Tests the retrieval of document segments with pagination and filtering:
+- Basic pagination (page, limit)
+- Status filtering
+- Keyword search
+- Ordering by position and id (to avoid duplicate data)
+"""
+
+from unittest.mock import Mock, create_autospec, patch
+
+import pytest
+
+from models.dataset import DocumentSegment
+
+
+class SegmentServiceTestDataFactory:
+    """
+    Factory class for creating test data and mock objects for segment tests.
+    """
+
+    @staticmethod
+    def create_segment_mock(
+        segment_id: str = "segment-123",
+        document_id: str = "doc-123",
+        tenant_id: str = "tenant-123",
+        dataset_id: str = "dataset-123",
+        position: int = 1,
+        content: str = "Test content",
+        status: str = "completed",
+        **kwargs,
+    ) -> Mock:
+        """
+        Create a mock document segment.
+
+        Args:
+            segment_id: Unique identifier for the segment
+            document_id: Parent document ID
+            tenant_id: Tenant ID the segment belongs to
+            dataset_id: Parent dataset ID
+            position: Position within the document
+            content: Segment text content
+            status: Indexing status
+            **kwargs: Additional attributes
+
+        Returns:
+            Mock: DocumentSegment mock object
+        """
+        segment = create_autospec(DocumentSegment, instance=True)
+        segment.id = segment_id
+        segment.document_id = document_id
+        segment.tenant_id = tenant_id
+        segment.dataset_id = dataset_id
+        segment.position = position
+        segment.content = content
+        segment.status = status
+        for key, value in kwargs.items():
+            setattr(segment, key, value)
+        return segment
+
+
+class TestSegmentServiceGetSegments:
+    """
+    Comprehensive unit tests for SegmentService.get_segments method.
+
+    Tests cover:
+    - Basic pagination functionality
+    - Status list filtering
+    - Keyword search filtering
+    - Ordering (position + id for uniqueness)
+    - Empty results
+    - Combined filters
+    """
+
+    @pytest.fixture
+    def mock_segment_service_dependencies(self):
+        """
+        Common mock setup for segment service dependencies.
+
+        Patches:
+        - db: Database operations and pagination
+        - select: SQLAlchemy query builder
+        """
+        with (
+            patch("services.dataset_service.db") as mock_db,
+            patch("services.dataset_service.select") as mock_select,
+        ):
+            yield {
+                "db": mock_db,
+                "select": mock_select,
+            }
+
+    def test_get_segments_basic_pagination(self, mock_segment_service_dependencies):
+        """
+        Test basic pagination functionality.
+
+        Verifies:
+        - Query is built with document_id and tenant_id filters
+        - Pagination uses correct page and limit parameters
+        - Returns segments and total count
+        """
+        # Arrange
+        document_id = "doc-123"
+        tenant_id = "tenant-123"
+        page = 1
+        limit = 20
+
+        # Create mock segments
+        segment1 = SegmentServiceTestDataFactory.create_segment_mock(
+            segment_id="seg-1", position=1, content="First segment"
+        )
+        segment2 = SegmentServiceTestDataFactory.create_segment_mock(
+            segment_id="seg-2", position=2, content="Second segment"
+        )
+
+        # Mock pagination result
+        mock_paginated = Mock()
+        mock_paginated.items = [segment1, segment2]
+        mock_paginated.total = 2
+
+        mock_segment_service_dependencies["db"].paginate.return_value = mock_paginated
+
+        # Mock select builder
+        mock_query = Mock()
+        mock_segment_service_dependencies["select"].return_value = mock_query
+        mock_query.where.return_value = mock_query
+        mock_query.order_by.return_value = mock_query
+
+        # Act
+        from services.dataset_service import SegmentService
+
+        items, total = SegmentService.get_segments(document_id=document_id, tenant_id=tenant_id, page=page, limit=limit)
+
+        # Assert
+        assert len(items) == 2
+        assert total == 2
+        assert items[0].id == "seg-1"
+        assert items[1].id == "seg-2"
+        mock_segment_service_dependencies["db"].paginate.assert_called_once()
+        call_kwargs = mock_segment_service_dependencies["db"].paginate.call_args[1]
+        assert call_kwargs["page"] == page
+        assert call_kwargs["per_page"] == limit
+        assert call_kwargs["max_per_page"] == 100
+        assert call_kwargs["error_out"] is False
+
+    def test_get_segments_with_status_filter(self, mock_segment_service_dependencies):
+        """
+        Test filtering by status list.
+
+        Verifies:
+        - Status list filter is applied to query
+        - Only segments with matching status are returned
+        """
+        # Arrange
+        document_id = "doc-123"
+        tenant_id = "tenant-123"
+        status_list = ["completed", "indexing"]
+
+        segment1 = SegmentServiceTestDataFactory.create_segment_mock(segment_id="seg-1", status="completed")
+        segment2 = SegmentServiceTestDataFactory.create_segment_mock(segment_id="seg-2", status="indexing")
+
+        mock_paginated = Mock()
+        mock_paginated.items = [segment1, segment2]
+        mock_paginated.total = 2
+
+        mock_segment_service_dependencies["db"].paginate.return_value = mock_paginated
+
+        mock_query = Mock()
+        mock_segment_service_dependencies["select"].return_value = mock_query
+        mock_query.where.return_value = mock_query
+        mock_query.order_by.return_value = mock_query
+
+        # Act
+        from services.dataset_service import SegmentService
+
+        items, total = SegmentService.get_segments(
+            document_id=document_id, tenant_id=tenant_id, status_list=status_list
+        )
+
+        # Assert
+        assert len(items) == 2
+        assert total == 2
+        # Verify where was called multiple times (base filters + status filter)
+        assert mock_query.where.call_count >= 2
+
+    def test_get_segments_with_empty_status_list(self, mock_segment_service_dependencies):
+        """
+        Test with empty status list.
+
+        Verifies:
+        - Empty status list is handled correctly
+        - No status filter is applied to avoid WHERE false condition
+        """
+        # Arrange
+        document_id = "doc-123"
+        tenant_id = "tenant-123"
+        status_list = []
+
+        segment = SegmentServiceTestDataFactory.create_segment_mock(segment_id="seg-1")
+
+        mock_paginated = Mock()
+        mock_paginated.items = [segment]
+        mock_paginated.total = 1
+
+        mock_segment_service_dependencies["db"].paginate.return_value = mock_paginated
+
+        mock_query = Mock()
+        mock_segment_service_dependencies["select"].return_value = mock_query
+        mock_query.where.return_value = mock_query
+        mock_query.order_by.return_value = mock_query
+
+        # Act
+        from services.dataset_service import SegmentService
+
+        items, total = SegmentService.get_segments(
+            document_id=document_id, tenant_id=tenant_id, status_list=status_list
+        )
+
+        # Assert
+        assert len(items) == 1
+        assert total == 1
+        # Should only be called once (base filters, no status filter)
+        assert mock_query.where.call_count == 1
+
+    def test_get_segments_with_keyword_search(self, mock_segment_service_dependencies):
+        """
+        Test keyword search functionality.
+
+        Verifies:
+        - Keyword filter uses ilike for case-insensitive search
+        - Search pattern includes wildcards (%keyword%)
+        """
+        # Arrange
+        document_id = "doc-123"
+        tenant_id = "tenant-123"
+        keyword = "search term"
+
+        segment = SegmentServiceTestDataFactory.create_segment_mock(
+            segment_id="seg-1", content="This contains search term"
+        )
+
+        mock_paginated = Mock()
+        mock_paginated.items = [segment]
+        mock_paginated.total = 1
+
+        mock_segment_service_dependencies["db"].paginate.return_value = mock_paginated
+
+        mock_query = Mock()
+        mock_segment_service_dependencies["select"].return_value = mock_query
+        mock_query.where.return_value = mock_query
+        mock_query.order_by.return_value = mock_query
+
+        # Act
+        from services.dataset_service import SegmentService
+
+        items, total = SegmentService.get_segments(document_id=document_id, tenant_id=tenant_id, keyword=keyword)
+
+        # Assert
+        assert len(items) == 1
+        assert total == 1
+        # Verify where was called for base filters + keyword filter
+        assert mock_query.where.call_count == 2
+
+    def test_get_segments_ordering_by_position_and_id(self, mock_segment_service_dependencies):
+        """
+        Test ordering by position and id.
+
+        Verifies:
+        - Results are ordered by position ASC
+        - Results are secondarily ordered by id ASC to ensure uniqueness
+        - This prevents duplicate data across pages when positions are not unique
+        """
+        # Arrange
+        document_id = "doc-123"
+        tenant_id = "tenant-123"
+
+        # Create segments with same position but different ids
+        segment1 = SegmentServiceTestDataFactory.create_segment_mock(
+            segment_id="seg-1", position=1, content="Content 1"
+        )
+        segment2 = SegmentServiceTestDataFactory.create_segment_mock(
+            segment_id="seg-2", position=1, content="Content 2"
+        )
+        segment3 = SegmentServiceTestDataFactory.create_segment_mock(
+            segment_id="seg-3", position=2, content="Content 3"
+        )
+
+        mock_paginated = Mock()
+        mock_paginated.items = [segment1, segment2, segment3]
+        mock_paginated.total = 3
+
+        mock_segment_service_dependencies["db"].paginate.return_value = mock_paginated
+
+        mock_query = Mock()
+        mock_segment_service_dependencies["select"].return_value = mock_query
+        mock_query.where.return_value = mock_query
+        mock_query.order_by.return_value = mock_query
+
+        # Act
+        from services.dataset_service import SegmentService
+
+        items, total = SegmentService.get_segments(document_id=document_id, tenant_id=tenant_id)
+
+        # Assert
+        assert len(items) == 3
+        assert total == 3
+        mock_query.order_by.assert_called_once()
+
+    def test_get_segments_empty_results(self, mock_segment_service_dependencies):
+        """
+        Test when no segments match the criteria.
+
+        Verifies:
+        - Empty list is returned for items
+        - Total count is 0
+        """
+        # Arrange
+        document_id = "non-existent-doc"
+        tenant_id = "tenant-123"
+
+        mock_paginated = Mock()
+        mock_paginated.items = []
+        mock_paginated.total = 0
+
+        mock_segment_service_dependencies["db"].paginate.return_value = mock_paginated
+
+        mock_query = Mock()
+        mock_segment_service_dependencies["select"].return_value = mock_query
+        mock_query.where.return_value = mock_query
+        mock_query.order_by.return_value = mock_query
+
+        # Act
+        from services.dataset_service import SegmentService
+
+        items, total = SegmentService.get_segments(document_id=document_id, tenant_id=tenant_id)
+
+        # Assert
+        assert items == []
+        assert total == 0
+
+    def test_get_segments_combined_filters(self, mock_segment_service_dependencies):
+        """
+        Test with multiple filters combined.
+
+        Verifies:
+        - All filters work together correctly
+        - Status list and keyword search both applied
+        """
+        # Arrange
+        document_id = "doc-123"
+        tenant_id = "tenant-123"
+        status_list = ["completed"]
+        keyword = "important"
+        page = 2
+        limit = 10
+
+        segment = SegmentServiceTestDataFactory.create_segment_mock(
+            segment_id="seg-1",
+            status="completed",
+            content="This is important information",
+        )
+
+        mock_paginated = Mock()
+        mock_paginated.items = [segment]
+        mock_paginated.total = 1
+
+        mock_segment_service_dependencies["db"].paginate.return_value = mock_paginated
+
+        mock_query = Mock()
+        mock_segment_service_dependencies["select"].return_value = mock_query
+        mock_query.where.return_value = mock_query
+        mock_query.order_by.return_value = mock_query
+
+        # Act
+        from services.dataset_service import SegmentService
+
+        items, total = SegmentService.get_segments(
+            document_id=document_id,
+            tenant_id=tenant_id,
+            status_list=status_list,
+            keyword=keyword,
+            page=page,
+            limit=limit,
+        )
+
+        # Assert
+        assert len(items) == 1
+        assert total == 1
+        # Verify filters: base + status + keyword
+        assert mock_query.where.call_count == 3
+        # Verify pagination parameters
+        call_kwargs = mock_segment_service_dependencies["db"].paginate.call_args[1]
+        assert call_kwargs["page"] == page
+        assert call_kwargs["per_page"] == limit
+
+    def test_get_segments_with_none_status_list(self, mock_segment_service_dependencies):
+        """
+        Test with None status list.
+
+        Verifies:
+        - None status list is handled correctly
+        - No status filter is applied
+        """
+        # Arrange
+        document_id = "doc-123"
+        tenant_id = "tenant-123"
+
+        segment = SegmentServiceTestDataFactory.create_segment_mock(segment_id="seg-1")
+
+        mock_paginated = Mock()
+        mock_paginated.items = [segment]
+        mock_paginated.total = 1
+
+        mock_segment_service_dependencies["db"].paginate.return_value = mock_paginated
+
+        mock_query = Mock()
+        mock_segment_service_dependencies["select"].return_value = mock_query
+        mock_query.where.return_value = mock_query
+        mock_query.order_by.return_value = mock_query
+
+        # Act
+        from services.dataset_service import SegmentService
+
+        items, total = SegmentService.get_segments(
+            document_id=document_id,
+            tenant_id=tenant_id,
+            status_list=None,
+        )
+
+        # Assert
+        assert len(items) == 1
+        assert total == 1
+        # Should only be called once (base filters only, no status filter)
+        assert mock_query.where.call_count == 1
+
+    def test_get_segments_pagination_max_per_page_limit(self, mock_segment_service_dependencies):
+        """
+        Test that max_per_page is correctly set to 100.
+
+        Verifies:
+        - max_per_page parameter is set to 100
+        - This prevents excessive page sizes
+        """
+        # Arrange
+        document_id = "doc-123"
+        tenant_id = "tenant-123"
+        limit = 200  # Request more than max_per_page
+
+        mock_paginated = Mock()
+        mock_paginated.items = []
+        mock_paginated.total = 0
+
+        mock_segment_service_dependencies["db"].paginate.return_value = mock_paginated
+
+        mock_query = Mock()
+        mock_segment_service_dependencies["select"].return_value = mock_query
+        mock_query.where.return_value = mock_query
+        mock_query.order_by.return_value = mock_query
+
+        # Act
+        from services.dataset_service import SegmentService
+
+        SegmentService.get_segments(
+            document_id=document_id,
+            tenant_id=tenant_id,
+            limit=limit,
+        )
+
+        # Assert
+        call_kwargs = mock_segment_service_dependencies["db"].paginate.call_args[1]
+        assert call_kwargs["max_per_page"] == 100