▎ 摘　　要

NOVELTY - The preparation method of silicon oxide graphene composite nanomaterial involves (1) ball-milling graphite and strong oxidant, washing, filtering, and drying to obtain few graphene layers, (2) placing silicon monoxide, few graphene layers and potassium ferrate in a high energy ball mill, dry grinding, uniformly dispersing, washing, filtering and drying. USE - Preparation method of silicon oxide graphene composite nanomaterial for preparing negative electrode in lithium ion battery. ADVANTAGE - The method enables preparation of silicon oxide graphene composite nanomaterial with excellent electrochemical property, smaller volume expansion, and prolonged service life.