(1), this paper discusses the historical background of the Yi-Hai alliance: In early May 1935, after the Central Red Army crossed the Jinsha River into Sichuan, Chiang deployed the heavy troops of the Sichuan Army of the Kuomintang to stop the Red Army to arrive to the north of the Dadu River, trying to use the natural danger of the Dadu River and other special favorable terrain to eliminate the Red Army in the south of the Dadu River, and the Red Army faced the most dangerous moment. (2), it objectively analyzes the unfavorable factors and main difficulties faced by the advance team of the Red Army in the uwu Yi district; This paper deeply analyzes why Liu Bocheng, the commander of the advance team of the Red Army, reached an alliance with Xiaoye Dan, the leader of the Yi nationality, successfully passed the Yi area, and then won the time to cross the Dadu River The special contribution of Yi-Hai Alliance to the Chinese revolution and its glorious enlightenment are summarized: Yi-hai Alliance is the Yi people's special contribution to the Chinese revolution. Yi-hai alliance is a great victory of the party's national policy and united front policy; Yi-hai alliance is a glorious example of national unity and military-civilian unity; Yi-hai alliance is the precious spiritual heritage of red blood.The conclusion part of this paper will discuss the specific suggestions on how to incorporate the red cultural heritage of the Yi area in 1935 into the cross-disciplinary construction of today's Yi studies.