缅彝语支语言分别有自己的声调系统,经历了不同的历史变化。本文通过比较研究,梳理出缅彝语言声调基本对应条例。从声调与声母相互关系的角度出发,观察声调对应条例所反映的规律,提出缅彝语阴阳调假说,解释缅彝语言声调的历史发展。文章指出缅彝语言声调的一个特点,因古送气音出现阴阳调互见的变例,但又不至于混淆阴阳两类声调的界限。阴阳调假说可以上推共同缅彝语有*A、*B、*C、*D 4个调类。 Myanmar Yi language branch has its own tone system, has undergone different historical changes. Through comparative study, this paper sort out the basic corresponding regulations of Burmese language tone. From the perspective of the relationship between tone and initials, we observe the law reflected in the corresponding regulations of tone, propose the yin-yang hypothesis of Myanmar-Yi language, and explain the historical development of the tone of Myanmar-Yi language. The article points out one characteristic of the tone of Myanmar Yi language, because of the variation of yin and yang tune because of the ancient air supply tone, it does not confuse the boundaries between the two types of tones of yin and yang. Yin and yang hypothesis can be pushed together with Myanmar Yi language * A, * B, * C, * D 4 tone class.