The invention discloses a degradable plastic material. The degradable plastic material comprises the following raw materials in part by weight: 5-50 parts of hydroxybutyrate and valeric acid copolyester PHBV4, 50-55 parts of peanut protein prowder, 15-18 parts of nanometer cellulose whiskers, 12-15 parts of coconut fibers, 3-5 parts of amylase, 1.5-2.2 parts of silane coupling agents, 2-3 parts of potassium sorbate, 2-3 parts of dehydroacetic acids, 1.4-1.6 parts of dioctyl phthalate, 1.2-1.6 parts of zinc stearate, 10-12 parts of hard clay, 5-9 parts of kaolin, 7-11 parts of sepiolite and 1-1.4 parts of 2, 6- di-tert-butyl-4-methylphenol BHT. The degradable plastic material can be completely decomposed into micromolecule substances under effects of microorganisms; the tensile strength, the breakage elongation and the light transmission of the degradable plastic material are close to those of the existing polypropylene; and the degradable plastic material can replace the polypropylene in some fields.