▎ 摘　　要

NOVELTY - Improving strength of silkworm cocoon comprises (i) mixing nano-graphene oxide, vinyl acetate, beta-sitosterol and water to obtain solution, and(ii) spraying the solution obtained in the step (i) on mature leaves, drying the mulberry leaves, feeding the silkworm to the middle and late stages of the 5 instars for improving the silk strength of the silkworm cocoon. USE - The method is useful for improving strength of silkworm cocoon. ADVANTAGE - The method has low cost, strong usability, convenient operation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: 1 preparing feed for improving strength of silkworm cocoon silk; and 2 use of nano graphene oxide, vinyl acetate and beta-sitosterol in improving silk strength of silkworm cocoon.