Abstract: Yak milk industry is an important choice for consolidating poverty alleviation and achieving benign development of livestock industry in Qinghai-Tibet Plateau,and multiple subjects such as government,enterprises and herdsmen play different roles in promoting the construction of industrial chain.Taking Seni District of Naqu City as an example,this study found through field research that leading enterprises became key subjects in adding value to yak milk,breeding cooperatives became important carriers of herders' income,supply and marketing cooperatives became important supplements to market development,herdsmen benefit significantly from the development of yak milk industry,and rural grassroots organizations' construction and management levels improved significantly.At present,the yak milk industry in Naqu has problems such as primary industrial development,homogeneous competition,overload and overgrazing of grassland,irregular management of cooperatives,too much administrative intervention and food safety risks,etc..Based on the strategic position of the yak milk industry to the sustainable development of Qinghai-Tibet Plateau,the next step should be to strengthen the basic research and science and technology investment,actively attract and train management talents,improve the benefit linkage mechanism of the industrial chain,clarify the responsibilities of multiple subjects,and promote the healthy and sustainable development of local yak milk industry.

Key words: Qinghai-Tibet Plateau, yak milk industry, leading enterprises, cooperatives, herdsmen