The study of"appearance"has attracted more and more attention in linguistics circles.Mengali,a branch of Miao language,belongs to the first indigenous language in Sichuan,Guizhou and Yunnan,a sub-dialect in the western part of Miao language.According to its grammatical differences and related features,the appearance categories of"Mengali"are mainly divided into nine appearances:initial,progressive,trend,attempted/short-term,repeated,continuous,random,accompanying and attached.The appearance category marking mainly relies on function words,which play an irreplaceable role in the appearance category of Miao language.The degree of grammaticization of"Mengali"shows inconsistent development,some words have a high degree of legalization,and some words have a low degree of legalization.