The invention discloses a spongy polymer adsorbing material with thickness of 15-20mm and density of 600-720g / L. The material is prepared by weaving a fibrous polymer adsorbing material; and a preparation method comprises the specific steps of: preparing a linear polymer with molecular weight of 1.5-20000 into polymer wires by a melt blown spinning method; and passing the wires through a cross-linking agent and a porogenic agent solution at 130-150 DEG C for 25-35 s to obtain the fibrous polymer adsorbing material; and finally weaving the material to obtain the sponge adsorbing material. The spongy polymer adsorbing material provided by the invention has controllable thickness and density, and characteristics of high adsorption capacity, fast adsorption and good strength, and can satisfy the requirements of fast response and quick disposal of incidents, especially treatment of oil spill pollution; besides, the material does not cause damage to the environment, and is suitable for industrial application.