Abstract: As one of the main transportation means of modern material and information currency, the desert highway plays an important part in the economic development of desert regions. The sand cover is the major sand hazard form in the desert highway. The smoothing Particle Hydrodynamic (SPH) method was employed to carry out two dimension numerical simulation to the sand cover with different embankment heights in desert highway in this paper according to the coupling characteristics of gas and solid phase flow in wind-blown sand. The distribution characteristics of the sand grains on the highway under different wind speed were obtained, and the logical design methods for determining the height of embankment of desert highway were presented. The results show that the SPH method has the superiority in simulating the wind-blown sand.