In order to improve the performance of the heat exchanger, the effect of the opening scheme and the number of the new double-sided staggered vortex generator on the heat transfer and flow resistance characteristics of the finned tube heat exchanger was studied by numerical simulation method when the Reynolds number was 1 000 ~ 4 400. The structure of vortex generator was designed by two-factor optimization method, and the location was optimized by Taguchi method. The thermal performance of finned tube heat exchangers under different schemes was compared by heat transfer factor, friction factor and comprehensive performance evaluation coefficient. The results show that compared with the single-sided arrangement of vortex generators, the double-sided arrangement has better comprehensive performance. The increase in the number of holes in the vortex generator does not lead to a continuous decrease in the friction factor, and the comprehensive performance is better when the vortex generator is located close to the end of the vortex generator and only one hole is opened. The arrangement of the vortex generator in the fourth row of tubes has little effect on the heat transfer and flow resistance, and there is little difference in the comprehensive performance, but as the vortex generator continues to be reduced, there is a large attenuation of the comprehensive performance.