The Hongliang River and other places along the Qinghai-Tibet Railway have serious desertification, and there are two measures to prevent sand: one is a sand retaining wall, that is, a prefabricated concrete slab is erected to intercept sand carried by the wind and deposit it; The other is a stone lattice with a general size of1m *1m. Sand is fixed in the grid, and grass roots are planted inside, which can fix sand in the grid and prevent sand dunes from moving.