Abstract:“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