diff --git a/mindspore/ops/primitive.py b/mindspore/ops/primitive.py
index 74975d832d3..834f4d5b280 100644
--- a/mindspore/ops/primitive.py
+++ b/mindspore/ops/primitive.py
@@ -26,7 +26,7 @@ from . import signature as sig
 
 class Primitive(Primitive_):
     """
-    Primitive is the base class of primitives in python.
+    Primitive is the base class of operator primitives in python.
 
     Args:
         name (str): Name for the current Primitive.
@@ -175,15 +175,27 @@ class Primitive(Primitive_):
 
     def check_elim(self, *args):
         """
-        Check if certain inputs should go to the backend. Subclass in need should override this method.
+        Check if the primitive can be eliminated. Subclass in need should override this method.
 
         Args:
             args(Primitive args): Same as arguments of current Primitive.
 
         Returns:
-            A tuple consisting of two elements. The first element indicates whether we should filter out current
-            arguments; the second element is the output if we need to filter out the arguments.
-        """
+            A tuple consisting of two elements.
+            The first element means if the primitive can be calculated in compiling stage
+            the second element is calculated result .
+
+        Examples:
+            >>> class AddN(Primitive):
+            >>>     @prim_attr_register
+            >>>     def __init__(self):
+            >>>         self.init_prim_io_names(inputs=["inputs"], outputs=["sum"])
+            >>>     def check_elim(self, inputs):
+            >>>         if len(inputs) != 1:
+            >>>             return (False, None)
+            >>>         if isinstance(inputs[0], Tensor):
+            >>>             return (True, inputs[0])
+    """
         return (False, None)
 
     def __call__(self, *args):
@@ -223,7 +235,7 @@ class Primitive(Primitive_):
 
     @property
     def update_parameter(self):
-        """ Whether the primitive will update the value of parameter."""
+        """Return whether the primitive will update the value of parameter."""
         return self._update_parameter
 
     def recompute(self, mode=True):
@@ -321,7 +333,7 @@ class PrimitiveWithCheck(Primitive):
         return None
 
     def __check__(self, *args):
-        """Check shape, type, and value at the same time by using dictionary as arguments."""
+        """Checking the input shape and the input type of ops is valid """
         tracks = ['dtype', 'shape']
         for track in tracks:
             fn = getattr(self, 'check_' + track)
@@ -478,13 +490,23 @@ def prim_attr_register(fn):
     Primitive attributes register.
 
     Register the decorator of the built-in operator primitive '__init__'.
-    The function will add all the parameters of '__init__' as operator attributes.
+    The function will add all the parameters of '__init__' as operator attributes ,
+    and init primtive name.
 
     Args:
         fn (function): __init__ function of primitive.
 
     Returns:
         function, original function.
+
+    Examples:
+        >>> class MatMul(PrimitiveWithCheck):
+        >>>     @prim_attr_register
+        >>>     def __init__(self, transpose_a=False, transpose_b=False):
+        >>>         self.init_prim_io_names(inputs=['x1', 'x2'], outputs=['output'])
+        >>>         cls_name = self.name
+        >>>         validator.check_value_type("transpose_a", transpose_a, [bool], cls_name)
+        >>>         validator.check_value_type("transpose_b", transpose_b, [bool], cls_name)
     """
 
     def deco(self, *args, **kwargs):
@@ -539,10 +561,12 @@ def constexpr(fn=None, get_instance=True, name=None):
 
     def deco(fn):
         """Decorator for CompileOp."""
+
         class CompileOp(PrimitiveWithInfer):
             """
             CompileOp is a temporary operator used to execute the constexpr function.
             """
+
             def __init__(self):
                 op_name = name if name else fn.__name__
                 PrimitiveWithInfer.__init__(self, op_name)
diff --git a/mindspore/ops/vm_impl_registry.py b/mindspore/ops/vm_impl_registry.py
index b8b00be1616..c7480b039c9 100644
--- a/mindspore/ops/vm_impl_registry.py
+++ b/mindspore/ops/vm_impl_registry.py
@@ -42,6 +42,9 @@ def get_vm_impl_fn(prim):
     Args:
         prim (Union[Primitive, str]): primitive object or name for operator register.
 
+    Note:
+        This mechanism applied for debugging currently.
+
     Returns:
         function, vm function
     """