Abstract: Northern dialect is the basic dialect of modern Han nationality，s common language. For Xiaguan dialect belonging to Northern dialect, it is similar as well as different with Mandarin in many aspects. By analyzing vowels, consonants and intonation, the essay makes a comparative study between Mandarin and Xiaguan Dialect which represented by Guanyi voice, analyzes voice differences between them, and underlines characteristics of voice of Xiaguan dialect, in order to supply some basic materials for the promotion of Mandarin and the study of Xiaguan dialect.