Based on the stochastic theories of soil wind erosion, a stochastic model for soil wind erosion isfounded, and the stochastic probability distributions, expectations and variations for stun a kinds erodible soil particles at any time are calculated. Com-pared with the former researches, the model do not need to limit the length of the time,and classified the factors which influence the wind erosion as different kinds. And through those can analysis for single factor or through calculating the joint probability density distributions of those factors and analysis the relations-hips of those factors synthetically.