Foaming spinning material, rough surface geomembrane and preparation methods of both

The invention relates to the field of high polymer materials, and discloses a foaming spinning material and a rough surface geomembrane as well as preparation methods of the both. The foaming spinning material comprises a component I, a component II, a component III, a component IV and a component V, wherein the component I is low density polyethylene; the component II is selected from at least one of polystyrene, polycarbonate, polymethyl methacrylate, polyethylene glycol terephthalate, polybutylene terephthalate and polyamide; wherein the component III is selected from polypropylene and/or high-density polyethylene; the component IV is an inorganic filler; and the component V consists of a foaming agent and a foaming accelerant. The foaming spinning material is sprayed on the polyethylene smooth geomembrane through a spinning technology, spinning is stable, and the polyethylene smooth geomembrane does not fall off after being sprayed, so that the purposes of roughening the polyethylene smooth geomembrane an