how i can add one more sub menu into menu bar(by defaul we can add only one sub menu)
Are you asking for instructions about using the WayFinder snippet to create menus, or something else?
I want add one more submenu into menue ,same like the picture
Aha. OK so you are asking how to change the menu type in WayFinder. Check out the documentation for that snippet (you can easily use a different config file and change your menu to the way you want it):
http://modxcms.com/Wayfinder-868.html
And the best place to post any further questions about this would be to the WayFinder forum:
http://modxcms.com/forums/index.php/board,182.0.html