The interior soft decoration art of the Buddhist temple has a long history. Under the influence of the unique historical, geographical and religious conditions, it has formed a unique architectural artistic temperament, which will carry forward and inherit the Tibetan Buddhist art well. Through the field investigation of the Tibetan Buddhist temples in Aba Prefecture, Sichuan Province, this paper explores the artistic characteristics of the interior soft decoration of the Buddhist temples in Aba County, and analyzes them. From the deep analysis of the interior soft decoration art of the Buddhist temple with rich connotation, through the discussion of its color expression, pattern composition and decoration method, and the relationship with space coordination, this paper sums up the artistic characteristics of the interior soft decoration art of the Buddhist temple in Tibetan Buddhist architecture.