Salt drainage pipe for soil improvement

The utility model relates to the technical field of soil improvement, particularly to a salt drainage pipe for soil improvement, which includes a compacted PVC water drain pipe embedded in a tunnel or a ditch, wherein a plurality of salt drainage holes are uniformly distributed on the pipe wall of the PVC water drain pipe; the total of the surface areas of the salt drainage holes is no less than the area of the pipe wall of the PVC water drain pipe; the salt drainage pipe also includes a geotextile covering layer covered on the outer wall of the PVC water drain pipe, and the water permeability of the geotextile covering layer is more than 10 times than that of the soil. The salt drainage pipe for soil improvement can fully utilize the groundwater capillary elevation mechanism, the saline and alkaline in the groundwater can permeate the salt drainage pipe and is naturally drained, the rain water and the irrigation water on the earth surface can dissolve the saline and alkaline and permeate the salt drainage pi