“们”can be used as a suffix in Qinghai Ledu dialect, and its specific use is analyzed as below: 1stly, it can be used behind the name of humanbeing, as a symbol of singular; 2ndly, it can be used after the name of animal or plants as a symbol of plurality; 3rdly, it also can be viewed as a symbol of plurality when it is behind a countable inanimate noun; at last it still can be used after the uncountable inanimate noun and the abstract noun We hold that there must be some relationship between this phenomena and language contacts, and it is the outcome of the interaction of Mongolian and other foreign languages