The invention belongs to the technical field of chemical synthesis and specifically relates to a master batch of a household storage box for storing grains. The master batch of the household storage box for storing the grains is prepared by the raw materials according to the weight percentage: 3-10% insect-resistant traditional Chinese medicine, 85-95% host material, 0.5-2% coupling agent, 0.5-2% dispersant and 1-3% gas phase white carbon black; the insect-resistant traditional Chinese medicine is one or more of pepper, wormwood, litsea cubeba, flaccid knotweed herb, calamus, camphor tree, pyrethrum, ailanthus leaves and melia azedarach leaves; and the host material is LDPE, LLPE, PP, EVA, mLDPE or POE. A prepared insect-preventive grain bag of the household storage box for storing the grains can effectively prevent insect bites, damages caused by rats and so on, can effectively avoid insect breeding and can prolong the grain storage time.