High-strength degradable bio-based artificial leather and preparation method thereof

The invention provides high-strength degradable bio-based artificial leather and a preparation method thereof. The high-strength degradable bio-based artificial leather comprises a bottom layer, a first foaming layer, a second foaming layer and a surface layer which are sequentially stacked from bottom to top, the bottom layer is prepared from bast fibers, pineapple leaf fibers and coconut shell fibers through spinning and slurry covering, and slurry for slurry covering is prepared from the following raw materials: waterborne polyurethane resin, poly trimethylene ether glycol, polyhydroxyalkanoate, polylactic acid, starch and water. According to the bio-based artificial leather and the preparation method thereof, the adopted bast fibers, pineapple leaf fibers and coconut shell fibers are all biodegradable materials, the raw materials are easy to obtain, environmentally friendly and free of pollution, and the three kinds of fibers are all materials which are flexible in texture, rich in elasticity and high in