缅彝语声调的起源和发展变化受声母（如清浊、送气不送气等）和韵母（如元音的长短、松紧、辅音韵尾等）的制约。声调比较不宜简单地对待声调对应关系，还必须历史地联系声母和韵母的状况，才能找出其发展变化的规律，缅彝语调类的科学概念才得以建立起来。本文结合比较法对缅语４个祖调及其子调和次子调进行了解释，并描述其在２０多种语言或方言中的反映形式。 The origins and changes of the tone of Burmese Yi language are restricted by initials (such as voicing, aspiration, etc.) and vowels (such as vowel length, elastic, consonant ending, etc.). Tone comparison should not be simple to deal with the relationship between tone, but also the history consonants and vowel must be in contact with the situation, in order to find out the law of development and change, Myanmar Yi tone class of scientific concepts was established. In this paper, the comparative method is used to explain the four ancestral Burmese ancestors and their sub-reconciliation sub-subordinates, and to describe their reflection in more than 20 languages ​​or dialects.