The invention discloses a paper-imitating biodegradable resin and a preparation method. For improving the degradability and natural recoverability of paper-imitating materials and making the paper-imitating materials have similar
lightness, foldability and printing and writing performance as the conventional paper. The paper-imitating biodegradable resin uses mineral fibers,
vegetable fibers and
starch fibers as main components, and concretely comprises the following components in part by weight: 40 to 70 parts of mineral fibers, 10 to 30 parts of
vegetable fibers, 5 to 20 parts of
starch fibers, 5 to 15 parts of
biopolymer, 3 to 5 parts of modifier, 3 to 5 parts of compatibilizer and 3 to 8 parts of
processing assistant. The mineral fibers,
vegetable fibers and
starch fibers are interweaved through
thermoplastic processing, and the preparation process is clear and
pollution-free. The paper-imitating biodegradable resin can be processed into various paper-imitating products by hot plasticizing equipment, and the products, when discarded, can be swallowed and decomposed by microbes without polluting the environment.