The 20th CPC National Congress proposed in terms of social governance to accelerate the modernization of social governance,improve social governance capabilities,and improve governance efficiency.The modernization of social governance meets the development needs of effective governance among the overall requirements for rural revitalization,and has become an inevitable logical and realistic choice for rural revitalization.Based on the background of rural revitalization,this paper summarizes the practice and effectiveness of Nujiang River's efforts to promote the modernization of social governance and diversified co-governance;summarizes the practical difficulties of Nujiang's social governance modernization;explores further promoting the modernization of social governance in Yunnan border ethnic areas,for the purpose of helping rural revitalization develop green and sustainable.