Abstract: The paper simulates the effects of ambient wind on the development of orgraphic-convective cloud by means of a two-dimensional compressible convective cloud model with terrain-following coordinate. The results indicate: Ambient wind has a great influence on the developing intensity, structure and precipitation of orographic-convective cloud over an upslope. When the middle-upper wind and lower upslope wind are in the reverse direction, the large the wind speed and Shear intensity of middle-upper level wind, the severer the convection; when in the identical direction, ambient wind will weaken the maximum intensity of convection.