diff --git a/hydrolib/core/io/dflowfm/xyz/serializer.py b/hydrolib/core/io/dflowfm/xyz/serializer.py
index bd1d7d8e3..0485a2639 100644
--- a/hydrolib/core/io/dflowfm/xyz/serializer.py
+++ b/hydrolib/core/io/dflowfm/xyz/serializer.py
@@ -1,5 +1,5 @@
 from pathlib import Path
-from typing import Dict
+from typing import Dict, Generator
 
 from hydrolib.core.basemodel import SerializerConfig
 
@@ -16,9 +16,21 @@ def serialize(path: Path, data: Dict, config: SerializerConfig) -> None:
             config (SerializerConfig): The serialization configuration.
         """
         path.parent.mkdir(parents=True, exist_ok=True)
+
+        space = 1 * " "
+        format_float = lambda x: f"{x:{config.float_format}}"
+
         with path.open("w") as f:
             for point in data["points"]:
+                geometry: str = space.join([format_float(p) for p in XYZSerializer._get_point_values(point)])
                 if point.comment:
-                    f.write(f"{point.x} {point.y} {point.z} # {point.comment}\n")
+                    f.write(f"{geometry} # {point.comment}\n")
                 else:
-                    f.write(f"{point.x} {point.y} {point.z}\n")
+                    f.write(f"{geometry}\n")
+
+    @staticmethod
+    def _get_point_values(point) -> Generator[float, None, None]:
+        yield point.x
+        yield point.y
+        yield point.z
+
diff --git a/tests/data/reference/xyz/test.xyz b/tests/data/reference/xyz/test.xyz
new file mode 100644
index 000000000..79baabbc5
--- /dev/null
+++ b/tests/data/reference/xyz/test.xyz
@@ -0,0 +1,2 @@
+1.23 2.34 3.45
+4.57 5.68 6.79 # Some comment
diff --git a/tests/io/dflowfm/test_xyz.py b/tests/io/dflowfm/test_xyz.py
new file mode 100644
index 000000000..87011db3a
--- /dev/null
+++ b/tests/io/dflowfm/test_xyz.py
@@ -0,0 +1,23 @@
+from tests.utils import test_output_dir, test_reference_dir, assert_files_equal
+from hydrolib.core.io.dflowfm.xyz.models import XYZPoint
+from hydrolib.core.io.dflowfm.xyz.serializer import XYZSerializer
+from hydrolib.core.basemodel import SerializerConfig
+
+class TestXYZSerializer:
+    def test_serialize(self):
+        output_file = test_output_dir / "test.xyz"
+        reference_file = test_reference_dir / "xyz" / "test.xyz"
+
+        data = {
+            "points" : [
+                XYZPoint(x=1.232, y=2.343, z= 3.454),
+                XYZPoint(x=4.565, y=5.676, z= 6.787, comment="Some comment")]
+        }
+
+        config = SerializerConfig(float_format=".2f")
+
+        XYZSerializer.serialize(output_file, data, config)
+
+        assert_files_equal(output_file, reference_file)
+
+