The revised wind erosion equation (RWEQ) is used to calculate the spatial and temporal changes of the wind erosion in Horqin Left Back Banner from 2010 to 2016, to evaluate the implementation effect of “Double Ten Million Mu” comprehensive management project in Horqin sandy land carried out by Tongliao Government. The results show that the wind erosion decreases significantly in Horqin Left Back Banner from 2010 to 2016, and the total wind erosion decreases from 38.93 million tons in 2010 to 18.83 million tons in 2016, down by 51.63%. The average wind erosion in the project implementation area is higher than the average wind erosion in Horqin Left Back Banner, which shows that the project construction achieves remarkable achievements and reduces the erosion effectively in the project area with high wind erosion. Project area construction has certain extraterritorial effect, and the positive effect of the project construction works not only within the project area, but also in the surrounding areas. The effective range is about 3 km far from the project area. After two years of project implementation, the relative wind erosion coefficient of different distance buffers decreases, and the closer to the project area the buffer is, the more positive effects it behaves.