diff --git a/model_zoo/utils/hccl_tools/README.md b/model_zoo/utils/hccl_tools/README.md
index b73a99e592c..3bbe149a829 100644
--- a/model_zoo/utils/hccl_tools/README.md
+++ b/model_zoo/utils/hccl_tools/README.md
@@ -5,10 +5,13 @@ mindspore distributed training launch helper utilty that will generate hccl conf
 # use
 
 ```
-python hccl_tools.py --device_num [1,8]
+python hccl_tools.py --device_num [0,8)
 ```
 
 output:
 ```
 hccl_[device_num]p_[which device]_[server_ip].json
-```
\ No newline at end of file
+```
+
+# Note
+Please note that the D chips used must be continuous, such [0,4) means to use four chips 0，1，2，3; [0,1) means to use chip 0; The first four chips are a group, and the last four chips are a group. In addition to the [0,8) chips are allowed, other cross-group such as [3,6) are prohibited.
\ No newline at end of file
diff --git a/model_zoo/utils/hccl_tools/hccl_tools.py b/model_zoo/utils/hccl_tools/hccl_tools.py
index 5afcb231599..b9a039489ef 100644
--- a/model_zoo/utils/hccl_tools/hccl_tools.py
+++ b/model_zoo/utils/hccl_tools/hccl_tools.py
@@ -36,12 +36,12 @@ def parse_args():
     parser = ArgumentParser(description="mindspore distributed training launch "
                                         "helper utilty that will generate hccl"
                                         " config file")
-    parser.add_argument("--device_num", type=str, default="[0,8]",
+    parser.add_argument("--device_num", type=str, default="[0,8)",
                         help="The number of the D chip used. please note that the D chips"
-                             "used must be continuous, such [0,4] means to use four chips "
-                             "0，1，2，3; [0,1] means to use chip 0; The first four chips are"
+                             "used must be continuous, such [0,4) means to use four chips "
+                             "0，1，2，3; [0,1) means to use chip 0; The first four chips are"
                              "a group, and the last four chips are a group. In addition to"
-                             "the [0,8] chips are allowed, other cross-group such as [3,6]"
+                             "the [0,8) chips are allowed, other cross-group such as [3,6)"
                              "are prohibited.")
     parser.add_argument("--visible_devices", type=str, default="0,1,2,3,4,5,6,7",
                         help="will use the visible devices sequentially")