A land-surface model is improved by using some new research results.Net radiation, surface temperature, sensible heat,
latent heat and temperature, specific humidity and wind velocity in ground layer under precipitation condition are simulated by using
the data observed at Dunhuang in the“Field Experiment on Interaction between Land and Atmosphere in the Arid Region of
Northwest China”.The results show that the model is ameliorated well.The radiation flux and surface temperature simulation are
better than energy. The simulation of the temperature, specific humidity and wind speed in ground layer is well because the ground
layer is considered alone in this model.