Lee waves of moist air with different distribution of water vapor were simulated by the ARPS model. The influences of water vapor and latent heat on atmospheric stratification stability and the development and evolvement of lee waves were analyzed. Results show that latent heat of condensation plays an important role in the development of convective movements. The effect of latent heat of condensation on distribution characteristic of atmospheric stratification is greater than that direct effect induced by water vapor. The rapid fall of stratification stability and obvious breakage of original distribution of atmospheric stratification caused by the release of latent heat could give rise to strong vertical motion and breakdown of lee waves. It should be noted that the assumption that the parameter of latent heat control in the experiment was assigned to 0, 1／2 and 2 could not be accepted in the actual movement.