Abstract：The law of particle acceleration motion in gas-solid two-phase flow is studied. The analytical solution and the numerical one of the acceleration time and the acceleration length are given for particles under the action of Klyachko and Putnam forces. The acceleration time and the acceleration length are studied for the single spherical particle with different diameters and velocities of wind，and the results are applied to the acceleration motion of the dust and sand particles. In the end of this paper，it is presented that the key to prevent sandstorm is to prevent the particle from wind erosion and acceleration，and some suggestions on prevention of sandstorm are made by analysis and comparison.
