Abstract: Custom of Tujia nationality in Xiangxi region underwent a thorough and deep change during the “Tugaiguiliu” period,a period during which political and economical reforms were committed under the reign of Emperor Yongzheng of Qing Dynasty. This is a typical case in the human history of custom.This paper explores the phenomenon from a psychological perspective,i.e.the dominant political motivation as well as that of the acceptant,holding that under the influence of certain political power,with the change of human emotion,concept,and ideology,human custom will also change in certain degree.

Key words: Gaituguiliu, Tujia nationality, sudden change of custom, psychological motivation