▎ 摘　　要

NOVELTY - The method involves mixing nano-graphene oxide, vinyl acetate, β -sitosterol with water to obtain a solution. The solution is sprayed on the mature leaves. After the mulberry leaves are dried, the silkworms are fed in the middle and late stages of 5-age period of silkworm to improve silkworm silk strength. The 5- age period is 4-5 days. The concentration of the nano graphene oxide is 1.5-2.5 g/l. The concentration of vinyl acetate is 1-2 mg/l, and concentration of β -sitosterol is 1-2 mg/l in the solution. USE - The method is useful for improving silkworm cocoon silk strength and improving cocoon filament strong force. ADVANTAGE - The method improves silkworm cocoon silk strength to promote high quality development of silk industry, is economical, easy in operation and increases the yield by more than 8%, utilizes oxidation graphene (GO) due to the unique small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect which is better than conventional particles of heat, magnetic, light sensitive characteristics and surface stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a feed for improving silkworm cocoon filament strong force.