The three-dimensional composite drainage network is made of high-density polyethylene (HDPE) as raw material and anti ultraviolet additives by special extrusion process. It has a three-layer special structure, the middle type of strip is rigid and vertically arranged, forming a straight drainage channel in the drainage direction, and the ribs on both sides are arranged in a cross way to increase the overall stability of the drainage network.

Three dimensional composite drainage network has the characteristics of anti-aging and corrosion resistance. The use of highway and railway subgrade can effectively distribute the load, improve the bearing capacity and stability of subgrade, and extend the service life. Laying geonet on the side slope of highway and railway can prevent rock and soil sliding, protect water and soil and beautify environment. Reservoir and river dyke protection laying can effectively prevent landslides. In coastal engineering, its flexibility and permeability are good to buffer the impact energy of waves.