diff --git a/hugegraph-llm/src/hugegraph_llm/nodes/index_node/build_gremlin_example_index.py b/hugegraph-llm/src/hugegraph_llm/nodes/index_node/build_gremlin_example_index.py
index 697a88ca7..4dc915406 100644
--- a/hugegraph-llm/src/hugegraph_llm/nodes/index_node/build_gremlin_example_index.py
+++ b/hugegraph-llm/src/hugegraph_llm/nodes/index_node/build_gremlin_example_index.py
@@ -34,7 +34,7 @@ def node_init(self):
         # pylint: disable=import-outside-toplevel
         from hugegraph_llm.utils.vector_index_utils import get_vector_index_class
 
-        if not self.wk_input.examples:
+        if self.wk_input.examples is None:
             return CStatus(-1, "examples is required in BuildGremlinExampleIndexNode")
         examples = self.wk_input.examples
         vector_index = get_vector_index_class(index_settings.cur_vector_index)
diff --git a/hugegraph-llm/src/hugegraph_llm/operators/index_op/build_gremlin_example_index.py b/hugegraph-llm/src/hugegraph_llm/operators/index_op/build_gremlin_example_index.py
index fb385a59c..15aea5d1f 100644
--- a/hugegraph-llm/src/hugegraph_llm/operators/index_op/build_gremlin_example_index.py
+++ b/hugegraph-llm/src/hugegraph_llm/operators/index_op/build_gremlin_example_index.py
@@ -38,14 +38,24 @@ def __init__(
         self.vector_index = vector_index
 
     def run(self, context: Dict[str, Any]) -> Dict[str, Any]:
-        # !: We have assumed that self.example is not empty
+        if not self.examples:
+            self.vector_index.clean(self.vector_index_name)
+            context["embed_dim"] = 0
+            return context
+
         queries = [example["query"] for example in self.examples]
         # TODO: refactor function chain async to avoid blocking
         examples_embedding = asyncio.run(get_embeddings_parallel(self.embedding, queries))
+
+        if not examples_embedding:
+            self.vector_index.clean(self.vector_index_name)
+            context["embed_dim"] = 0
+            return context
+
         embed_dim = len(examples_embedding[0])
-        if len(self.examples) > 0:
-            vector_index = self.vector_index.from_name(embed_dim, self.vector_index_name)
-            vector_index.add(examples_embedding, self.examples)
-            vector_index.save_index_by_name(self.vector_index_name)
+        vector_index = self.vector_index.from_name(embed_dim, self.vector_index_name)
+        vector_index.add(examples_embedding, self.examples)
+        vector_index.save_index_by_name(self.vector_index_name)
+
         context["embed_dim"] = embed_dim
-        return context
+        return context
\ No newline at end of file
diff --git a/hugegraph-llm/src/tests/operators/index_op/test_build_gremlin_example_index.py b/hugegraph-llm/src/tests/operators/index_op/test_build_gremlin_example_index.py
index 239e377ae..fa0b37252 100644
--- a/hugegraph-llm/src/tests/operators/index_op/test_build_gremlin_example_index.py
+++ b/hugegraph-llm/src/tests/operators/index_op/test_build_gremlin_example_index.py
@@ -54,7 +54,10 @@ def test_init(self):
         self.assertEqual(self.index_builder.vector_index_name, "gremlin_examples")
 
     @patch('asyncio.run')
-    @patch('hugegraph_llm.utils.embedding_utils.get_embeddings_parallel')
+    @patch(
+        'hugegraph_llm.operators.index_op.build_gremlin_example_index.get_embeddings_parallel',
+        new_callable=MagicMock,
+    )
     def test_run_with_examples(self, mock_get_embeddings_parallel, mock_asyncio_run):
         """Test run method with examples"""
         # Setup mocks
@@ -78,7 +81,10 @@ def test_run_with_examples(self, mock_get_embeddings_parallel, mock_asyncio_run)
         self.assertEqual(context["embed_dim"], 3)
 
     @patch('asyncio.run')
-    @patch('hugegraph_llm.utils.embedding_utils.get_embeddings_parallel')
+    @patch(
+        'hugegraph_llm.operators.index_op.build_gremlin_example_index.get_embeddings_parallel',
+        new_callable=MagicMock,
+    )
     def test_run_with_empty_examples(self, mock_get_embeddings_parallel, mock_asyncio_run):
         """Test run method with empty examples"""
         # Create new mocks for this test
@@ -98,12 +104,24 @@ def test_run_with_empty_examples(self, mock_get_embeddings_parallel, mock_asynci
         # Run the method
         context = {}
 
-        # This should raise an IndexError when trying to access examples_embedding[0]
-        with self.assertRaises(IndexError):
-            empty_index_builder.run(context)
+        # Empty examples should be handled gracefully without building vector index.
+        result = empty_index_builder.run(context)
+
+        mock_asyncio_run.assert_not_called()
+        mock_get_embeddings_parallel.assert_not_called()
+        mock_vector_store_class.clean.assert_called_once_with("gremlin_examples")
+        mock_vector_store_class.from_name.assert_not_called()
+        mock_vector_store_instance.add.assert_not_called()
+        mock_vector_store_instance.save_index_by_name.assert_not_called()
+
+        self.assertEqual(result["embed_dim"], 0)
+        self.assertEqual(context["embed_dim"], 0)
 
     @patch('asyncio.run')
-    @patch('hugegraph_llm.utils.embedding_utils.get_embeddings_parallel')
+    @patch(
+        'hugegraph_llm.operators.index_op.build_gremlin_example_index.get_embeddings_parallel',
+        new_callable=MagicMock,
+    )
     def test_run_single_example(self, mock_get_embeddings_parallel, mock_asyncio_run):
         """Test run method with single example"""
         # Create new mocks for this test
@@ -134,7 +152,10 @@ def test_run_single_example(self, mock_get_embeddings_parallel, mock_asyncio_run
         self.assertEqual(result["embed_dim"], 4)
 
     @patch('asyncio.run')
-    @patch('hugegraph_llm.utils.embedding_utils.get_embeddings_parallel')
+    @patch(
+        'hugegraph_llm.operators.index_op.build_gremlin_example_index.get_embeddings_parallel',
+        new_callable=MagicMock,
+    )
     def test_run_preserves_existing_context(self, mock_get_embeddings_parallel, mock_asyncio_run):
         """Test that run method preserves existing context data"""
         # Setup mocks