diff --git a/changes/1557-wangpeibao.md b/changes/1557-wangpeibao.md
new file mode 100644
index 0000000000..f4aa9355c1
--- /dev/null
+++ b/changes/1557-wangpeibao.md
@@ -0,0 +1 @@
+change `schema.field_class_to_schema` to support `frozenset` in schema.
diff --git a/pydantic/schema.py b/pydantic/schema.py
index 3ca516a906..9562e74b46 100644
--- a/pydantic/schema.py
+++ b/pydantic/schema.py
@@ -623,6 +623,7 @@ def field_singleton_sub_fields_schema(
     (list, {'type': 'array', 'items': {}}),
     (tuple, {'type': 'array', 'items': {}}),
     (set, {'type': 'array', 'items': {}, 'uniqueItems': True}),
+    (frozenset, {'type': 'array', 'items': {}, 'uniqueItems': True}),
 )
 
 json_scheme = {'type': 'string', 'format': 'json-string'}
diff --git a/tests/test_schema.py b/tests/test_schema.py
index ce447d5ec7..3175345332 100644
--- a/tests/test_schema.py
+++ b/tests/test_schema.py
@@ -1837,6 +1837,9 @@ class Model(BaseModel):
 def test_frozen_set():
     class Model(BaseModel):
         a: FrozenSet[int] = frozenset({1, 2, 3})
+        b: FrozenSet = frozenset({1, 2, 3})
+        c: frozenset = frozenset({1, 2, 3})
+        d: frozenset = ...
 
     assert Model.schema() == {
         'title': 'Model',
@@ -1848,8 +1851,12 @@ class Model(BaseModel):
                 'type': 'array',
                 'items': {'type': 'integer'},
                 'uniqueItems': True,
-            }
+            },
+            'b': {'title': 'B', 'default': frozenset({1, 2, 3}), 'type': 'array', 'items': {}, 'uniqueItems': True},
+            'c': {'title': 'C', 'default': frozenset({1, 2, 3}), 'type': 'array', 'items': {}, 'uniqueItems': True},
+            'd': {'title': 'D', 'type': 'array', 'items': {}, 'uniqueItems': True},
         },
+        'required': ['d'],
     }