The research of the tone evolvement in 20 th is concentrated on three aspects: the origin, the diachronic evolvement, the synchronic evolvement. There are two theories, the theory of final ending and the theory of initial, about the origin of Chinese tone. Theory of diachronic evolvement is fastened ontoneme research, the research in mediaeval commenced with tonal quality research. There are not so many research works about synchronic research, most of these research viewpoints are about evolvement types and conditions explore. The problems about those viewpoints are diachronic but not linearization, synchronic but incomprehensive.
