As the opening of High Speed Rail lines in succession, aviation passage traffic is affected by the HSR network in the domestic hundreds of cities. The model of aviation diversion can quantitatively analyze the impact of overall diversion of air passenger market or the impact of area diversion when a single high-speed rail line opened by HSR. It is helpful to predict the development and changes of the domestic air transport market accurately. Adopting the method of computation statistics for the diversion model, with difference of travel time and fares floating as basic variables, aviation transport data and HSR transport data collected home and abroad are analyzed.Finally, the diversion effects of total air market and Beijing-Shanghai route are obtained. The modeling of air passage traffic diversion effected by HSR will play an important role in air market forecast and route optimization.