A regional earth-air coupled cilmate model is used to investigate the effects of soiltypes on regional short-term climate in parts of N and NW China, with stress on the impact ofsoil types on sea-level pressure, near-surface temperature soil temperature,PBL wind speed,vertical motion, surface energy balance and the conversion. The obtained results will provide aclimatic basis for reasonably developing and utilizing land resources in an attempt to prevent soildesert ificat ion.