The heat balance character of artificial vegetation on sand dunes in Shapotou region were calculated and analysed. The results show that: (1) about 70 percent of net radiation is dispersing as latent flux,about 15 percent is dispersing as sensible heat flux,and about 15 percent is stored in the soil in the artificial vegetation region on sand dunes. (2) about 60 percent of net radiation is dispersing as latent heat flux,about 15 percent is dispersing as sensible heat flux,about 25 persent is stored in the soil in the bare sand dunes. (3) the water vapour content is higher than that of another dry area in Shapotou region.