diff --git a/eng/mgmt/automation/generate.py b/eng/mgmt/automation/generate.py
index 1496dfbe99ee3..47437d8adc470 100755
--- a/eng/mgmt/automation/generate.py
+++ b/eng/mgmt/automation/generate.py
@@ -325,6 +325,7 @@ def parse_args() -> argparse.Namespace:
         action = 'store_true',
         help = 'Do compile after generation or not',
     )
+    parser.add_argument('--suffix', help = 'Suffix for namespace and artifact')
     parser.add_argument(
         '--auto-commit-external-change',
         action = 'store_true',
@@ -340,6 +341,20 @@ def parse_args() -> argparse.Namespace:
     return parser.parse_args()
 
 
+def update_parameters(suffix):
+    # update changeable parameters in parameters.py
+    global SUFFIX, NAMESPACE_SUFFIX, ARTIFACT_SUFFIX, NAMESPACE_FORMAT, ARTIFACT_FORMAT, OUTPUT_FOLDER_FORMAT
+
+    SUFFIX = suffix
+
+    NAMESPACE_SUFFIX = '.{0}'.format(SUFFIX) if SUFFIX else ''
+    ARTIFACT_SUFFIX = '-{0}'.format(SUFFIX) if SUFFIX else ''
+    NAMESPACE_FORMAT = 'com.azure.resourcemanager.{{0}}{0}'.format(
+        NAMESPACE_SUFFIX)
+    ARTIFACT_FORMAT = 'azure-resourcemanager-{{0}}{0}'.format(ARTIFACT_SUFFIX)
+    OUTPUT_FOLDER_FORMAT = 'sdk/{{0}}/{0}'.format(ARTIFACT_FORMAT)
+
+
 def valid_service(service: str):
     return re.sub('[^a-z0-9_]', '', service.lower())
 
@@ -458,6 +473,7 @@ def sdk_automation(input_file: str, output_file: str):
 
 def main():
     args = vars(parse_args())
+    update_parameters(args.get('suffix'))
 
     if args.get('config'):
         return sdk_automation(args['config'][0], args['config'][1])
diff --git a/eng/mgmt/automation/parameters.py b/eng/mgmt/automation/parameters.py
index 346ef41ceb128..004b7feb25061 100644
--- a/eng/mgmt/automation/parameters.py
+++ b/eng/mgmt/automation/parameters.py
@@ -1,18 +1,24 @@
 #!/usr/bin/env python3
 
+# changeable parameters
+# use update logic in generate.py#update_parameters
+# set to None first to guarantee it would be updated
+SUFFIX = None
+
+NAMESPACE_SUFFIX = None
+ARTIFACT_SUFFIX = None
+NAMESPACE_FORMAT = None
+ARTIFACT_FORMAT = None
+OUTPUT_FOLDER_FORMAT = None
+
+# Constant parameters
 SDK_ROOT = '../../../'  # related to file dir
 AUTOREST_CORE_VERSION = '3.0.6327'
 AUTOREST_JAVA = '@autorest/java@4.0.5'
 DEFAULT_VERSION = '1.0.0-beta.1'
-SUFFIX = None           # 'generated'
 GROUP_ID = 'com.azure.resourcemanager'
 API_SPECS_FILE = 'api-specs.yaml'
 
-NAMESPACE_SUFFIX = '.{0}'.format(SUFFIX) if SUFFIX else ''
-ARTIFACT_SUFFIX = '-{0}'.format(SUFFIX) if SUFFIX else ''
-NAMESPACE_FORMAT = 'com.azure.resourcemanager.{{0}}{0}'.format(NAMESPACE_SUFFIX)
-ARTIFACT_FORMAT = 'azure-resourcemanager-{{0}}{0}'.format(ARTIFACT_SUFFIX)
-OUTPUT_FOLDER_FORMAT = 'sdk/{{0}}/{0}'.format(ARTIFACT_FORMAT)
 CI_FILE_FORMAT = 'sdk/{0}/ci.yml'
 POM_FILE_FORMAT = 'sdk/{0}/pom.xml'
 README_FORMAT = 'specification/{0}/resource-manager/readme.md'