The invention relates to a device and a method for improving a
saline land, wherein, the device comprises an
isolation layer arranged on the partial periphery of an
afforestation-waiting area, and a main blind drain and an auxiliary blind drain used for draining salt and alkali and arranged above the critical
water level in the
afforestation-waiting area, and the water outlets of the main blind drain and the auxiliary blind drain lead to a water-collecting well, the level surface of which is lower than the blind drains. The method comprises the flowing steps: arranging the
isolation layer, laying the blind drains, constructing the water-collecting well, and improving physical and chemical
soil properties. The invention has the advantages that the invention can fully use various
solid wastes as main materials available to improve the
saline land and conduct the improvement on the
saline land through the combination of physical, chemical, biological methods; the various
solid wastes can be used for constructing the main blind drain, the auxiliary blind drain and the water collecting well, and controlling the
water table; a tree microarea is planted, physical and chemical
soil properties on a
surface layer are improved, and the
salt content of the soil is reduced; and indigenous plants and new
plant species with the saline-alkali resistance are selected for being planted, and the
forestry afforestation and the
landscaping are achieved through the post-stage
nursing, long-term
salinity control and alkaline control measures.