The research measuresed 9 kinds of influences that Salix psammophila checkerboard to lose wind velocity,roughness length and the rate of sand transporting of the dissimilarity height,different specification.The result express: the protection benefit of zonal willow Salix psammophila checkerboard has direct relationship of Salix psammophila's height and forest belt implantation. When the number of lines is more and the distance between belts is smaller,the protection effect is better,but the cost is bigger.The belt-shaped Salix psammophila checkerboard made by sand willow can display the greatest cost benefit,when its specification is one belt and three lines.The benefit of one belt and two lines is lower.No matter how high of the belt,the benefit of one belt and one line is the lowest.