Method for reclaiming desert or desertified soil through utilizing sludge

The invention provides a method for reclaiming desert or desertified soil through utilizing sludge. The method comprises the following steps: digging a ditch or a pit region: digging the ditch or the pit region by guaranteeing that the depth is smaller than or equal to 3m, the width is 3m-5m and the coverage area is 10%-40% of a needed reclaiming area; backfilling the sludge: backfilling the sludge into the ditch or the pit region to form a sludge backfilling region, wherein the backfilling depth of the sludge is smaller than or equal to 3m; covering sandy soil: covering the sandy soil on the surface of the sludge, wherein the thickness of a covering layer is 10cm-30cm; and planting plants: planting the plants above and at the periphery of the sludge backfilling region to form a protection forest planting region, and enabling roots of the plants to extend toward the sludge backfilling region, so as to realize soil reclamation. The method provided by the invention adopts sludge backfilling and the desertified