By use of single station data in Siberian area and the 1998 GAME/HUBEX IOP data we evaluate a newly modified BATS land surface process model.The results show that the atmospheric forcing of different time intervals gives rise to significant differences in net solar radiation and latent heat in Siberian area.The simulated results for the Huaihe River Basin suggest that the model is able to reasonably simulate the variation trends of land surface characteristic quantities in summer in the semi-humid region of China.Becaue simulated ground temperature and net solar radiation are lower than the observed,simulated sensible heat and latent heat are also lower than the observed.Further study will be carried out to improve the model simulations by choosing adequate soil and vegetation parameters.