Abstract: A simplified semigeostrophic frontogenesis model with inclusion of large-scale condensation latent heat is derived and the effects of latent heat release on frontogenesis of warm front are discussed. The results show that due to the large-scale condensation heating, the warm front is intensified, the rate of frontogenesis and the velocity of updraft are increased, the ageostrophic crossfront circulation is more inclined and the extent of the ascent motion reduced. In short, the frontal circulation is made more characteristic of mesoscale system.