diff --git a/mindspore/ops/composite/multitype_ops/_constexpr_utils.py b/mindspore/ops/composite/multitype_ops/_constexpr_utils.py
index 8bc337010a..dac8949fdc 100644
--- a/mindspore/ops/composite/multitype_ops/_constexpr_utils.py
+++ b/mindspore/ops/composite/multitype_ops/_constexpr_utils.py
@@ -57,6 +57,26 @@ def check_equal(param1, param2, msg="{},{}"):
     return param1
 
 
+@constexpr
+def check_int_positive(arg_name, arg_value, op_name):
+    """Int type judgment."""
+    if isinstance(arg_value, int):
+        if arg_value > 0:
+            return arg_value
+        raise ValueError("For \'{}\' the `{}` must be positive, but got {}".format(op_name, arg_name, arg_value))
+    raise TypeError("For \'{}\' the `{}` must be int, cannot be {}".format(op_name, arg_name, type(arg_value)))
+
+
+@constexpr
+def check_non_negative(arg_name, arg_value, op_name):
+    """Int type judgment."""
+    if isinstance(arg_value, int):
+        if arg_value >= 0:
+            return arg_value
+        raise ValueError("For \'{}\' the `{}` must be non_negative, but got {}".format(op_name, arg_name, arg_value))
+    raise TypeError("For \'{}\' the `{}` must be int, cannot be {}".format(op_name, arg_name, type(arg_value)))
+
+
 @constexpr
 def check_ellipsis_shape_size(data_shape, value_shape, data_size, value_size):
     """Checks the shape and size of the sensor and value."""
diff --git a/mindspore/ops/composite/random_ops.py b/mindspore/ops/composite/random_ops.py
index d682f15031..00da9303bb 100644
--- a/mindspore/ops/composite/random_ops.py
+++ b/mindspore/ops/composite/random_ops.py
@@ -21,7 +21,6 @@ from ..primitive import constexpr
 from .multitype_ops import _constexpr_utils as const_utils
 from ...common import dtype as mstype
 from ..._checkparam import Validator as validator
-from ..._checkparam import check_int_positive
 from ..._checkparam import Rel
 
 # set graph-level RNG seed
@@ -41,7 +40,7 @@ def set_seed(seed):
     Examples:
         >>> C.set_seed(10)
     """
-    check_int_positive(seed)
+    const_utils.check_int_positive("seed", seed, "set_seed")
     global _GRAPH_SEED
     _GRAPH_SEED = seed
 
@@ -61,7 +60,6 @@ def get_seed():
     """
     return _GRAPH_SEED
 
-
 def normal(shape, mean, stddev, seed=0):
     """
     Generates random numbers according to the Normal (or Gaussian) random number distribution.
@@ -88,59 +86,14 @@ def normal(shape, mean, stddev, seed=0):
     stddev_dtype = F.dtype(stddev)
     const_utils.check_tensors_dtype_same(mean_dtype, mstype.float32, "normal")
     const_utils.check_tensors_dtype_same(stddev_dtype, mstype.float32, "normal")
+    const_utils.check_non_negative("seed", seed, "normal")
     seed1 = get_seed()
     seed2 = seed
     stdnormal = P.StandardNormal(seed1, seed2)
-    rnd = stdnormal(shape)
-    value = rnd * stddev + mean
+    random_normal = stdnormal(shape)
+    value = random_normal * stddev + mean
     return value
 
-
-def multinomial(inputs, num_sample=None, replacement=True, seed=0):
-    r"""
-    Returns a tensor sampled from the multinomial probability distribution located in the corresponding
-    row of tensor input.
-
-    Note:
-        The rows of input do not need to sum to one (in which case we use the values as weights),
-        but must be non-negative, finite and have a non-zero sum.
-    Args:
-        seed (int): Seed data is used as entropy source for Random number engines generating pseudo-random numbers.
-          Default: 0.
-
-    Inputs:
-        - **input** (Tensor) - the input tensor containing probabilities, must be 1 or 2 dims.
-        - **num_samples** (int) - number of samples to draw, default None.
-        - **replacement** (bool, optional) - whether to draw with replacement or not, default True.
-
-    Outputs:
-        Tensor. have the same rows with input, each row has num_samples sampled indices.
-
-    Examples:
-        >>> input = Tensor([0, 9, 4, 0], mstype.float32)
-        >>> output = C.multinomial(input, 2, True)
-    """
-    shape = P.Shape()
-    reshape = P.Reshape()
-    validator.check_value_type('replacement', replacement, (bool,), None)
-    validator.check_value_type('num_sample', num_sample, (int,), None)
-    validator.check_integer("num_sample", num_sample, 0, Rel.GT, None)
-    if inputs.dim() != 1 and inputs.dim() != 2:
-        raise ValueError("inputs dim must be 1d or 2d")
-    if not replacement:
-        if shape(inputs)[-1] < num_sample:
-            raise ValueError("num_sample must be less than shape(input)[-1] without replacement")
-        n_dist = 1
-        if len(shape(inputs)) > 1:
-            n_dist = shape(inputs)[-2]
-        random_uniform = P.UniformReal(seed=seed)((n_dist * num_sample,))
-        if n_dist != 1:
-            random_uniform = reshape(random_uniform, (n_dist, num_sample))
-        vals = P.RealDiv()(P.Log()(random_uniform), inputs + 1e-6)
-        _, indices = P.TopK()(vals, num_sample)
-        return indices
-    return P.Multinomial(seed=seed)(inputs, num_sample)
-
 def uniform(shape, a, b, seed=0, dtype=mstype.float32):
     """
     Generates random numbers according to the Uniform random number distribution.
@@ -158,27 +111,35 @@ def uniform(shape, a, b, seed=0, dtype=mstype.float32):
 
     Returns:
         Tensor. The shape should be the broadcasted shape of Input "shape" and shapes of a and b.
-        The dtype is float32.
+        The dtype is designated as the input `dtype`.
 
     Examples:
-        >>> shape = (4, 16)
-        >>> a = Tensor(1.0, mstype.float32)
-        >>> b = Tensor(1.0, mstype.float32)
+        >>> For discrete uniform distribution, only one number is allowed for both a and b:
+        >>> shape = (4, 2)
+        >>> a = Tensor(1, mstype.int32)
+        >>> b = Tensor(2, mstype.int32)
+        >>> output = C.uniform(shape, a, b, seed=5)
+        >>>
+        >>> For continuous uniform distribution, a and b can be multi-dimentional:
+        >>> shape = (4, 2)
+        >>> a = Tensor([1.0, 2.0], mstype.float32)
+        >>> b = Tensor([4.0, 5.0], mstype.float32)
         >>> output = C.uniform(shape, a, b, seed=5)
     """
     a_dtype = F.dtype(a)
     b_dtype = F.dtype(b)
     const_utils.check_tensors_dtype_same(a_dtype, dtype, "uniform")
     const_utils.check_tensors_dtype_same(b_dtype, dtype, "uniform")
+    const_utils.check_non_negative("seed", seed, "uniform")
     seed1 = get_seed()
     seed2 = seed
     if const_utils.is_same_type(dtype, mstype.int32):
-        rnd = P.UniformInt(seed1, seed2)
-        value = rnd(shape, a, b)
+        random_uniform = P.UniformInt(seed1, seed2)
+        value = random_uniform(shape, a, b)
     else:
         uniform_real = P.UniformReal(seed1, seed2)
-        rnd = uniform_real(shape)
-        value = rnd * (b - a) + a
+        random_uniform = uniform_real(shape)
+        value = random_uniform * (b - a) + a
     return value
 
 def gamma(shape, alpha, beta, seed=0):
@@ -206,6 +167,7 @@ def gamma(shape, alpha, beta, seed=0):
     beta_dtype = F.dtype(beta)
     const_utils.check_tensors_dtype_same(alpha_dtype, mstype.float32, "gamma")
     const_utils.check_tensors_dtype_same(beta_dtype, mstype.float32, "gamma")
+    const_utils.check_non_negative("seed", seed, "gamma")
     seed1 = get_seed()
     seed2 = seed
     random_gamma = P.Gamma(seed1, seed2)
@@ -233,8 +195,56 @@ def poisson(shape, mean, seed=0):
     """
     mean_dtype = F.dtype(mean)
     const_utils.check_tensors_dtype_same(mean_dtype, mstype.float32, "poisson")
+    const_utils.check_non_negative("seed", seed, "poisson")
     seed1 = get_seed()
     seed2 = seed
     random_poisson = P.Poisson(seed1, seed2)
     value = random_poisson(shape, mean)
     return value
+
+def multinomial(inputs, num_sample=None, replacement=True, seed=0):
+    r"""
+    Returns a tensor sampled from the multinomial probability distribution located in the corresponding
+    row of tensor input.
+
+    Note:
+        The rows of input do not need to sum to one (in which case we use the values as weights),
+        but must be non-negative, finite and have a non-zero sum.
+    Args:
+        seed (int): Seed data is used as entropy source for Random number engines generating pseudo-random numbers.
+          Default: 0.
+
+    Inputs:
+        - **input** (Tensor) - the input tensor containing probabilities, must be 1 or 2 dims.
+        - **num_samples** (int) - number of samples to draw, default None.
+        - **replacement** (bool, optional) - whether to draw with replacement or not, default True.
+
+    Outputs:
+        Tensor. have the same rows with input, each row has num_samples sampled indices.
+
+    Examples:
+        >>> input = Tensor([0, 9, 4, 0], mstype.float32)
+        >>> output = C.multinomial(input, 2, True)
+    """
+    shape = P.Shape()
+    reshape = P.Reshape()
+    validator.check_value_type('replacement', replacement, (bool,), None)
+    validator.check_value_type('num_sample', num_sample, (int,), None)
+    validator.check_integer("num_sample", num_sample, 0, Rel.GT, None)
+    if inputs.dim() != 1 and inputs.dim() != 2:
+        raise ValueError("inputs dim must be 1d or 2d")
+    if not replacement:
+        if shape(inputs)[-1] < num_sample:
+            raise ValueError("num_sample must be less than shape(input)[-1] without replacement")
+        n_dist = 1
+        if len(shape(inputs)) > 1:
+            n_dist = shape(inputs)[-2]
+        a = Tensor(0.0, mstype.float32)
+        b = Tensor(1.0, mstype.float32)
+        random_uniform = P.UniformReal(seed=seed)((n_dist * num_sample,), a, b)
+        if n_dist != 1:
+            random_uniform = reshape(random_uniform, (n_dist, num_sample))
+        vals = P.RealDiv()(P.Log()(random_uniform), inputs + 1e-6)
+        _, indices = P.TopK()(vals, num_sample)
+        return indices
+    return P.Multinomial(seed=seed)(inputs, num_sample)
diff --git a/mindspore/ops/operations/random_ops.py b/mindspore/ops/operations/random_ops.py
index a303f58dc7..61d659f00f 100644
--- a/mindspore/ops/operations/random_ops.py
+++ b/mindspore/ops/operations/random_ops.py
@@ -46,8 +46,8 @@ class StandardNormal(PrimitiveWithInfer):
     def __init__(self, seed=0, seed2=0):
         """Init StandardNormal"""
         self.init_prim_io_names(inputs=['shape'], outputs=['output'])
-        validator.check_value_type('seed', seed, [int], self.name)
-        validator.check_value_type('seed2', seed2, [int], self.name)
+        validator.check_integer("seed", seed, 0, Rel.GE, self.name)
+        validator.check_integer("seed2", seed2, 0, Rel.GE, self.name)
 
     def __infer__(self, shape):
         shape_v = shape["value"]
@@ -151,8 +151,8 @@ class Gamma(PrimitiveWithInfer):
     def __init__(self, seed=0, seed2=0):
         """Init Gamma"""
         self.init_prim_io_names(inputs=['shape', 'alpha', 'beta'], outputs=['output'])
-        validator.check_value_type('seed', seed, [int], self.name)
-        validator.check_value_type('seed2', seed2, [int], self.name)
+        validator.check_integer("seed", seed, 0, Rel.GE, self.name)
+        validator.check_integer("seed2", seed2, 0, Rel.GE, self.name)
 
     def __infer__(self, shape, alpha, beta):
         shape_v = shape["value"]
@@ -203,8 +203,8 @@ class Poisson(PrimitiveWithInfer):
     def __init__(self, seed=0, seed2=0):
         """Init Poisson"""
         self.init_prim_io_names(inputs=['shape', 'mean'], outputs=['output'])
-        validator.check_value_type('seed', seed, [int], self.name)
-        validator.check_value_type('seed2', seed2, [int], self.name)
+        validator.check_integer("seed", seed, 0, Rel.GE, self.name)
+        validator.check_integer("seed2", seed2, 0, Rel.GE, self.name)
 
     def __infer__(self, shape, mean):
         shape_v = shape["value"]
@@ -259,8 +259,8 @@ class UniformInt(PrimitiveWithInfer):
     def __init__(self, seed=0, seed2=0):
         """Init UniformInt"""
         self.init_prim_io_names(inputs=['shape', 'a', 'b'], outputs=['output'])
-        validator.check_value_type('seed', seed, [int], self.name)
-        validator.check_value_type('seed2', seed2, [int], self.name)
+        validator.check_integer("seed", seed, 0, Rel.GE, self.name)
+        validator.check_integer("seed2", seed2, 0, Rel.GE, self.name)
 
     def __infer__(self, shape, a, b):
         shape_v = shape["value"]
@@ -306,8 +306,8 @@ class UniformReal(PrimitiveWithInfer):
     def __init__(self, seed=0, seed2=0):
         """Init UniformReal"""
         self.init_prim_io_names(inputs=['shape'], outputs=['output'])
-        validator.check_value_type('seed', seed, [int], self.name)
-        validator.check_value_type('seed2', seed2, [int], self.name)
+        validator.check_integer("seed", seed, 0, Rel.GE, self.name)
+        validator.check_integer("seed2", seed2, 0, Rel.GE, self.name)
 
     def __infer__(self, shape):
         shape_v = shape["value"]