diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index aa4e24f7dd..5c0c7546aa 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -47,7 +47,7 @@ jobs:
         run: rm -rf .eggs && pip install -e .
       - name: Run unittests and generate coverage report
         run: |
-          pytest tests/ --ignore=tests/test_runner --ignore=tests/test_optimizer.py --ignore=tests/test_cnn --ignore=tests/test_parallel.py --ignore=tests/test_ops --ignore=tests/test_load_model_zoo.py --ignore=tests/test_utils/test_logging.py --ignore=tests/test_image/test_io.py --ignore=tests/test_utils/test_registry.py
+          pytest tests/ --ignore=tests/test_runner --ignore=tests/test_optimizer.py --ignore=tests/test_cnn --ignore=tests/test_parallel.py --ignore=tests/test_ops --ignore=tests/test_load_model_zoo.py --ignore=tests/test_utils/test_logging.py --ignore=tests/test_image/test_io.py --ignore=tests/test_utils/test_registry.py --ignore=tests/test_utils/test_parrots_jit.py
 
   build_without_ops:
     runs-on: ubuntu-latest
diff --git a/mmcv/utils/__init__.py b/mmcv/utils/__init__.py
index bf8792fae9..b2f160d9af 100644
--- a/mmcv/utils/__init__.py
+++ b/mmcv/utils/__init__.py
@@ -33,6 +33,7 @@
         DataLoader, PoolDataLoader, SyncBatchNorm, _AdaptiveAvgPoolNd,
         _AdaptiveMaxPoolNd, _AvgPoolNd, _BatchNorm, _ConvNd,
         _ConvTransposeMixin, _InstanceNorm, _MaxPoolNd, get_build_config)
+    from .parrots_jit import jit, skip_no_elena, skip_no_parrots
     from .registry import Registry, build_from_cfg
     __all__ = [
         'Config', 'ConfigDict', 'DictAction', 'collect_env', 'get_logger',
@@ -48,5 +49,6 @@
         '_InstanceNorm', '_MaxPoolNd', 'get_build_config', 'BuildExtension',
         'CppExtension', 'CUDAExtension', 'DataLoader', 'PoolDataLoader',
         'TORCH_VERSION', 'deprecated_api_warning', 'digit_version',
-        'get_git_hash', 'import_modules_from_strings'
+        'get_git_hash', 'import_modules_from_strings', 'jit', 'skip_no_elena',
+        'skip_no_parrots'
     ]
diff --git a/mmcv/utils/parrots_jit.py b/mmcv/utils/parrots_jit.py
new file mode 100644
index 0000000000..552fc999eb
--- /dev/null
+++ b/mmcv/utils/parrots_jit.py
@@ -0,0 +1,47 @@
+import pytest
+import torch
+
+TORCH_VERSION = torch.__version__
+
+if TORCH_VERSION == 'parrots':
+    from parrots.jit import pat as jit
+else:
+
+    def jit(func=None,
+            check_input=None,
+            full_shape=True,
+            derivate=False,
+            coderize=False,
+            optimize=False):
+
+        def wrapper(func):
+
+            def wrapper_inner(*args, **kargs):
+                return func(*args, **kargs)
+
+            return wrapper_inner
+
+        if func is None:
+            return wrapper
+        else:
+            return func
+
+
+if TORCH_VERSION == 'parrots':
+    from parrots.utils.tester import skip_no_elena
+else:
+
+    def skip_no_elena(func):
+
+        def wrapper(*args, **kargs):
+            return func(*args, **kargs)
+
+        return wrapper
+
+
+def is_using_parrots():
+    return TORCH_VERSION == 'parrots'
+
+
+skip_no_parrots = pytest.mark.skipif(
+    not is_using_parrots(), reason='test case under parrots environment')
diff --git a/tests/test_utils/test_parrots_jit.py b/tests/test_utils/test_parrots_jit.py
new file mode 100644
index 0000000000..66c85e4298
--- /dev/null
+++ b/tests/test_utils/test_parrots_jit.py
@@ -0,0 +1,272 @@
+import pytest
+import torch
+
+import mmcv
+
+
+class TestJit(object):
+
+    def test_add_dict(self):
+
+        @mmcv.jit
+        def add_dict(oper):
+            rets = oper['x'] + oper['y']
+            return {'result': rets}
+
+        def add_dict_pyfunc(oper):
+            rets = oper['x'] + oper['y']
+            return {'result': rets}
+
+        a = torch.rand((3, 4))
+        b = torch.rand((3, 4))
+        oper = {'x': a, 'y': b}
+
+        rets_t = add_dict(oper)
+        rets = add_dict_pyfunc(oper)
+        assert 'result' in rets
+        assert (rets_t['result'] == rets['result']).all()
+
+    def test_add_list(self):
+
+        @mmcv.jit
+        def add_list(oper, x, y):
+            rets = {}
+            for idx, pair in enumerate(oper):
+                rets[f'k{idx}'] = pair['x'] + pair['y']
+            rets[f'k{len(oper)}'] = x + y
+            return rets
+
+        def add_list_pyfunc(oper, x, y):
+            rets = {}
+            for idx, pair in enumerate(oper):
+                rets[f'k{idx}'] = pair['x'] + pair['y']
+            rets[f'k{len(oper)}'] = x + y
+            return rets
+
+        pair_num = 3
+        oper = []
+        for _ in range(pair_num):
+            oper.append({'x': torch.rand((3, 4)), 'y': torch.rand((3, 4))})
+        a = torch.rand((3, 4))
+        b = torch.rand((3, 4))
+        rets = add_list_pyfunc(oper, x=a, y=b)
+        rets_t = add_list(oper, x=a, y=b)
+        for idx in range(pair_num + 1):
+            assert f'k{idx}' in rets_t
+            assert (rets[f'k{idx}'] == rets_t[f'k{idx}']).all()
+
+    @mmcv.skip_no_parrots
+    def test_jit_cache(self):
+
+        @mmcv.jit
+        def func(oper):
+            if oper['const'] > 1:
+                return oper['x'] * 2 + oper['y']
+            else:
+                return oper['x'] * 2 - oper['y']
+
+        def pyfunc(oper):
+            if oper['const'] > 1:
+                return oper['x'] * 2 + oper['y']
+            else:
+                return oper['x'] * 2 - oper['y']
+
+        assert len(func._cache._cache) == 0
+
+        oper = {'const': 2, 'x': torch.rand((3, 4)), 'y': torch.rand((3, 4))}
+        rets_plus = pyfunc(oper)
+        rets_plus_t = func(oper)
+        assert (rets_plus == rets_plus_t).all()
+        assert len(func._cache._cache) == 1
+
+        oper['const'] = 0.5
+        rets_minus = pyfunc(oper)
+        rets_minus_t = func(oper)
+        assert (rets_minus == rets_minus_t).all()
+        assert len(func._cache._cache) == 2
+
+        rets_a = (rets_minus_t + rets_plus_t) / 4
+        assert torch.allclose(oper['x'], rets_a)
+
+    @mmcv.skip_no_parrots
+    def test_jit_shape(self):
+
+        @mmcv.jit
+        def func(a):
+            return a + 1
+
+        assert len(func._cache._cache) == 0
+
+        a = torch.ones((3, 4))
+        r = func(a)
+        assert r.shape == (3, 4)
+        assert (r == 2).all()
+        assert len(func._cache._cache) == 1
+
+        a = torch.ones((2, 3, 4))
+        r = func(a)
+        assert r.shape == (2, 3, 4)
+        assert (r == 2).all()
+        assert len(func._cache._cache) == 2
+
+    @mmcv.skip_no_parrots
+    def test_jit_kwargs(self):
+
+        @mmcv.jit
+        def func(a, b):
+            return torch.mean((a - b) * (a - b))
+
+        assert len(func._cache._cache) == 0
+        x = torch.rand((16, 32))
+        y = torch.rand((16, 32))
+        func(x, y)
+        assert len(func._cache._cache) == 1
+        func(x, b=y)
+        assert len(func._cache._cache) == 1
+        func(b=y, a=x)
+        assert len(func._cache._cache) == 1
+
+    def test_jit_derivate(self):
+
+        @mmcv.jit(derivate=True)
+        def func(x, y):
+            return (x + 2) * (y - 2)
+
+        a = torch.rand((3, 4))
+        b = torch.rand((3, 4))
+        a.requires_grad = True
+
+        c = func(a, b)
+        assert c.requires_grad
+        d = torch.empty_like(c)
+        d.fill_(1.0)
+        c.backward(d)
+        assert torch.allclose(a.grad, (b - 2))
+        assert b.grad is None
+
+        a.grad = None
+        c = func(a, b)
+        assert c.requires_grad
+        d = torch.empty_like(c)
+        d.fill_(2.7)
+        c.backward(d)
+        assert torch.allclose(a.grad, 2.7 * (b - 2))
+        assert b.grad is None
+
+    def test_jit_optimize(self):
+
+        @mmcv.jit(optimize=True)
+        def func(a, b):
+            return torch.mean((a - b) * (a - b))
+
+        def pyfunc(a, b):
+            return torch.mean((a - b) * (a - b))
+
+        a = torch.rand((16, 32))
+        b = torch.rand((16, 32))
+
+        c = func(a, b)
+        d = pyfunc(a, b)
+        assert torch.allclose(c, d)
+
+    @mmcv.skip_no_elena
+    def test_jit_coderize(self):
+        if not torch.cuda.is_available():
+            return
+
+        @mmcv.jit(coderize=True)
+        def func(a, b):
+            return (a + b) * (a - b)
+
+        def pyfunc(a, b):
+            return (a + b) * (a - b)
+
+        a = torch.rand((16, 32), device='cuda')
+        b = torch.rand((16, 32), device='cuda')
+
+        c = func(a, b)
+        d = pyfunc(a, b)
+        assert torch.allclose(c, d)
+
+    def test_jit_value_dependent(self):
+
+        @mmcv.jit
+        def func(a, b):
+            torch.nonzero(a)
+            return torch.mean((a - b) * (a - b))
+
+        def pyfunc(a, b):
+            torch.nonzero(a)
+            return torch.mean((a - b) * (a - b))
+
+        a = torch.rand((16, 32))
+        b = torch.rand((16, 32))
+
+        c = func(a, b)
+        d = pyfunc(a, b)
+        assert torch.allclose(c, d)
+
+    @mmcv.skip_no_parrots
+    def test_jit_check_input(self):
+
+        def func(x):
+            y = torch.rand_like(x)
+            return x + y
+
+        a = torch.ones((3, 4))
+        with pytest.raises(AssertionError):
+            func = mmcv.jit(func, check_input=(a, ))
+
+    @mmcv.skip_no_parrots
+    def test_jit_partial_shape(self):
+
+        @mmcv.jit(full_shape=False)
+        def func(a, b):
+            return torch.mean((a - b) * (a - b))
+
+        def pyfunc(a, b):
+            return torch.mean((a - b) * (a - b))
+
+        a = torch.rand((3, 4))
+        b = torch.rand((3, 4))
+        assert torch.allclose(func(a, b), pyfunc(a, b))
+        assert len(func._cache._cache) == 1
+
+        a = torch.rand((6, 5))
+        b = torch.rand((6, 5))
+        assert torch.allclose(func(a, b), pyfunc(a, b))
+        assert len(func._cache._cache) == 1
+
+        a = torch.rand((3, 4, 5))
+        b = torch.rand((3, 4, 5))
+        assert torch.allclose(func(a, b), pyfunc(a, b))
+        assert len(func._cache._cache) == 2
+
+        a = torch.rand((1, 9, 8))
+        b = torch.rand((1, 9, 8))
+        assert torch.allclose(func(a, b), pyfunc(a, b))
+        assert len(func._cache._cache) == 2
+
+    def test_instance_method(self):
+
+        class T(object):
+
+            def __init__(self, shape):
+                self._c = torch.rand(shape)
+
+            @mmcv.jit
+            def test_method(self, x, y):
+                return (x * self._c) + y
+
+        shape = (16, 32)
+        t = T(shape)
+        a = torch.rand(shape)
+        b = torch.rand(shape)
+        res = (a * t._c) + b
+        jit_res = t.test_method(a, b)
+        assert torch.allclose(res, jit_res)
+
+        t = T(shape)
+        res = (a * t._c) + b
+        jit_res = t.test_method(a, b)
+        assert torch.allclose(res, jit_res)