Abstract: In order to under stand the exchange and transfer processes of water and energy in the desert soil and the atmospheric boundary layer(ABL),A coupled model,in which a desert soil model including water movement of both liquid and vapor phase and an ABL model based on non-local transilient turbulence closure scheme are coupled together has been developed.With this model,the evolution of potential temperature and specific humidity,the distribution of netradiation among sensible,latent and soil heat flux,and the water and heat flux profiles both in the soil and ABL have been simulated.The HEIFE observation data are used to calibrate the calculation of the water and heat flux both in the soil and ABL.The sensible and latent heat contribute to warm and moisten the bottom grid box(100m) of the ABL,respectively,by this way,the ABL model and the model are coupled together.