Xinjiang is an important area linking China with Central Asia and Europe, and is a vital land pivot point of China"s "One Belt, One Road". As the number of flights increases year by year, the control pressure in Xinjiang control area increases year by year, and the problems of uneven load distribution and increasing conflict points in the sector are becoming more and more serious. This paper forecasts the traffic growth of the Xinjiang control region in 2035 in the light of the development requirements of China"s "One Belt, One Road" and "Air Silk Road", and then conducts a capacity assessment of the current sector classification scheme based on the controllers" workload. Finally, computer simulation technology is used to evaluate the sector designation scheme in 2035. The simulation results show that the new sector division can effectively reduce peak day traffic and peak hour traffic. Through reasonable division of sectors with high controller load, the control pressure has also been significantly alleviated. The simulation verifies the rationality and effectiveness of sector division.