With the rapid development of air transport, aviation noise pollution has become increasingly prominent. In order to alleviate the problem of aviation noise, the paper takes into account the conditions such as obstacle crossing, segment turn, around the fly limit area, and takes the minimum number of population affected by noise as the terminal route optimization target. At the same time, the method of aviation noise evaluation is analyzed, and the route optimization model of terminal approach route is constructed. By using the path optimization algorithm of A * based on the angle propagation method to obtain the route of noise reduction. Finally, taking the Hongqiao Airport in Shanghai as an example, this paper analyzes the traffic distribution of all models on the route of AND. The results show that the population under 65 dB or more is reduced from 440,000 to 210,000, also the length of the route is greatly reduced by 11.49%, fuel consumption reduced by 31.07%. Therefore, the proposed route optimization model of the terminal area can effectively reduce the aviation noise and reduce the noise impact, and play an advantage in shortening the route and reducing the fuel consumption.