Based on the theory of particle system, the simulation of the snow, rain and their real simulation in wind field in the virtual environment was implemented in this paper. The paper firstly illustrated the basic simulation principle of the particle system, and then descripted and analyzed the characteristic of the rain and the snow under the influence of the wind field; put forward the overall train of thought of the rain and the snow simulation. The paper simulated the rain and the snow according to the characteristics of the rain and the snow, the aerodynamics theory of them. By improved the Four-point linear water ripple simulation algorithm, the Eight-point water ripple linear algorithm was adopted to simulate the water ripple formed by the raindrops, atomization factor was applied to solve the fuzzy problem of snow environment.