The invention provides a degradable environment-friendly plastic film which is prepared from the following raw materials in parts by weight: 45 parts of thermoplastic starch, 6 parts of a compatible modified component, 15 parts of polylactic acid, 10 parts of calcium stearate, 25 parts of a plastic base material, 15 parts of polycaprolactone, 7 parts of an antibacterial agent, 3 parts of a degradation accelerator, 3 parts of a filler, 4 parts of a cross-linking agent, 26 parts of plant fibers, 1 part of an auxiliary agent, 50 parts of linear low-density polyethylene, 20 parts of polypropylene, 10 parts of disulfide carbamate, 10 parts of ethyl cellulose, 10 parts of bamboo charcoal powder, 3 parts of plasticizer, 5 parts of sodium alginate, 10 parts of zein, 5 parts of tartrate, 3 parts of 2-hydroxypropyl-beta-cyclodextrin, 3 parts of ASA high glue powder, 2 parts of light degradation agent, 1 part of light stabilizer and 2 parts of cedar wood oil. The plastic film has the beneficial effects that the plastic film is tough and durable, can be repeatedly used, is sanitary, non-toxic and environment-friendly, and is antibacterial, moisture-proof and dust-proof.