The Li costumes spread in Hainan Province are based on the four traditional crafts of spinning, dyeing, weaving and embroidery of the Li people. They are woven and stitched with sea island cotton, hemp, kapok, bark fiber and silk. The evolution history is thousands of years. The traditional costumes of the Li people are made of brocade, with various patterns, colorful and exquisitely made. It has more than 160 patterns, and the types of patterns mainly include human figures, animals, flowers, plants, utensils and geometric figures. The traditional costumes of the Li people are rooted in the social life of the Li people. The content and form are harmoniously unified, showing distinct local characteristics and rich national cultural connotations. They have extremely important reference value in the study of the social development history, folk customs, religious beliefs, production and life of the Hainan Li people. With the continuous acceleration of the modernization process, the self-sufficient natural economic system in the Hainan Li area has been destroyed. Under this situation, fewer and fewer people have mastered the traditional spinning, dyeing, weaving and embroidery skills. The inheritance of Li costumes has been severely impacted and is facing the danger of disappearance, which urgently needs rescue and protection.