The sandy desertification is serious in Ulanbuhe desert. Based on the observed data about the sand movement by wind in the fixed dune, the semi-fixeddune and the moving dune, the determinant models of the sand-transporting ratio were constructed respectively for the three types of dunes by the multivariate statistical analysis method. The relationship between the sand-transporting ratio and wind velocity or height were quantitatively analyzed; and the structure of aeolian sand was also examined. Research results from our analysis will provide constructive suggestions for the sandy desertification control in China.