The agreement marker is an important means to express the grammatical relationship between the nominal argument and the predicate verb.By investigating and analyzing the form performance of Hezhe agreement markers,it concludes the stability level of Hezhe agreement markers as follows:second person<first person<third person.Under the interaction of the internal dynamic evolution of language and the external social environment,Hezhe agreement markers tend to be simplified and fall off,which conforms to the typological characteristics of endangered language morphological changes.