Treatment method for desertification area

The invention provides a desertification area treatment method which comprises the steps that a to-be-treated desertification area is partitioned to form a plurality of vegetation blocks and a plurality of urease film-covered sandy soil blocks, and the vegetation blocks and the urease film-covered sandy soil blocks are connected in a staggered mode; super-xerophytes are planted in the vegetation block, a urease film-covering agent is sprayed on the surface of the urease film-covering sandy soil block, and the urease film-covering agent forms a sand-fixing film-covering layer with a certain thickness on the surface of sandy soil so as to reinforce surface sandy soil; the urease film coating agent comprises two components, the first component is a modified soybean urease solution, and the second component is a curing liquid. The modified soybean urease solution contains soybean urease, starch grafted acrylic acid copolymer particles with the particle size distribution of 0-3mm and chitosan; the curing liquid co