diff --git a/mindspore/mindrecord/filereader.py b/mindspore/mindrecord/filereader.py
index 91901ead459..c6ebe2837ba 100644
--- a/mindspore/mindrecord/filereader.py
+++ b/mindspore/mindrecord/filereader.py
@@ -30,7 +30,7 @@ class FileReader:
 
     Note:
         If `file_name` is a filename string, it tries to load all MindRecord files generated \
-        in a conversion, and throws an exceptions if a MindRecord file is missing.
+        in a conversion, and throws an exception if a MindRecord file is missing.
         If `file_name` is a filename list, only the MindRecord files in the list are loaded.
 
     Args:
@@ -75,5 +75,5 @@ class FileReader:
             iterator = self._reader.get_next()
 
     def close(self):
-        """Stop reader worker and close File."""
+        """Stop reader worker and close file."""
         self._reader.close()
diff --git a/mindspore/mindrecord/filewriter.py b/mindspore/mindrecord/filewriter.py
index 5bf63780e74..e0cdf500e74 100644
--- a/mindspore/mindrecord/filewriter.py
+++ b/mindspore/mindrecord/filewriter.py
@@ -322,7 +322,7 @@ class FileWriter:
 
         Args:
             header_size (int): Size of header, between 16*1024(16KB) and
-                128*1024*1024(128MB).(default=16MB)
+                128*1024*1024(128MB).
 
 
         Returns:
@@ -349,7 +349,7 @@ class FileWriter:
 
         Args:
            page_size (int): Size of page, between 32*1024(32KB) and
-               256*1024*1024(256MB).(default=32MB)
+               256*1024*1024(256MB).
 
         Returns:
             MSRStatus, SUCCESS or FAILED.
diff --git a/mindspore/mindrecord/tools/cifar100_to_mr.py b/mindspore/mindrecord/tools/cifar100_to_mr.py
index e7f8d65b813..ffeffad4e80 100644
--- a/mindspore/mindrecord/tools/cifar100_to_mr.py
+++ b/mindspore/mindrecord/tools/cifar100_to_mr.py
@@ -77,7 +77,7 @@ class Cifar100ToMR:
         Execute transformation from cifar100 to MindRecord.
 
         Args:
-            fields (list[str]): A list of index field, e.g.["fine_label", "coarse_label"].
+            fields (list[str]): A list of index field, e.g.["fine_label", "coarse_label"]. Default: None.
 
         Returns:
             MSRStatus, whether cifar100 is successfully transformed to MindRecord.
@@ -116,7 +116,7 @@ class Cifar100ToMR:
         Encapsulate the run function to exit normally
 
         Args:
-            fields (list[str]): A list of index field, e.g.["fine_label", "coarse_label"].
+            fields (list[str]): A list of index field, e.g.["fine_label", "coarse_label"]. Default: None.
 
         Returns:
             MSRStatus, whether cifar100 is successfully transformed to MindRecord.
diff --git a/mindspore/mindrecord/tools/tfrecord_to_mr.py b/mindspore/mindrecord/tools/tfrecord_to_mr.py
index a1511b4a695..92c85fee123 100644
--- a/mindspore/mindrecord/tools/tfrecord_to_mr.py
+++ b/mindspore/mindrecord/tools/tfrecord_to_mr.py
@@ -77,6 +77,7 @@ class TFRecordToMR:
         feature_dict (dict): a dictionary that states the feature type, and
             `VarLenFeature` is not supported.
         bytes_fields (list, optional): the bytes fields which are in `feature_dict` and can be images bytes.
+            Default: None.
 
     Raises:
         ValueError: If parameter is invalid.