The Baima Tibetan and Jiarong Tibetan, which locate at the key node of the "Tibetan-Qiang-Yi Corridor" in Northwest Sichuan, are two branches of Tibetans. They have diverse cultural components, showing a mixed, pluralistic and blended cultural outlook. Despite of the geographical distance between Baima Tibetan and Jiarong Tibetan, there is a relationship between their clothing culture, especially in the design of traditional female clothing. This paper mainly compares and analyzes the traditional female clothing of Baima Tibetan and Jiarong Tibetan in Northwest Sichuan. Due to the differences in their own cultural characteristics varying by geographical location, and in the sources and extent of the influence from "other cultures", their female clothing present different forms and cultural connotations that correspond to their own ethnic characteristics.