To resolve the problem of inadequate performance of road snowplow of engineering vehicles on current Chinese market, this paper used the theory of TRIZ to study the evolution of road snowplow of engineering vehicles.The theory makes the evolution by resolving the conflicts of snowplow development and design.This paper first analyzed the problems between the road and the vehicle, found the internal conflicts to restrict the evolution and sorts out the conflicts according to the characteristic, and used TRIZ theory to describe this characteristic by general technology parameters.In the second part, the author used conflict matrix and the separation principle to solve the corresponding technological and physical conflict, and found solutions to the inventive principles according to different types of conflict.Finally, according to the principle of the invention and combined with the engineering experience, we obtained the evolution of new snowplow of engineering vehicle programs.The analysis shows this new program of the vehicle has made rapid progress in avoiding obstacle performance, speed of removing snow and adaptability of snow.