方位词的归类是苗语语法体系研究中还没有解决的问题之一。在语法特征上，方位词与名词有很大的不同，把二者混同在一起，既表述不清方位词的特点．也影响对名词特征的阐明，把方位词作为一个独立的词类处理，符合语言的实际，同时对苗语实词中如代词、数量词、形容词、指示词等的表述也很有好处。 The classification of location words is one of the unsolved problems in the study of Hmong language grammar system. In terms of grammatical features, locative words are very different from nouns. When they are mixed together, they not only express the characteristics of locative words. It also affects the clarification of nouns’ characteristics. As a separate part of speech, directional words are treated in line with the reality of language. At the same time, it is also beneficial to expressions such as pronouns, quantifiers, adjectives, and demonstratives in Mulan.