▎ 摘　　要

NOVELTY - Modified carbon fiber comprises graphene oxide modified carbon fiber with transverse size of 50-50000 nm. USE - The material is useful for aerospace, rail transit, automobile, energy and ship. ADVANTAGE - The material has good interlayer shear performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the modified carbon fiber, comprising sizing and drying the carbon fiber with a liquid containing graphene oxide as a sizing agent, preferably, the sizing agent is graphene oxide, water and a surfactant; (2) improving interface performance between carbon fiber and resin matrix, comprising modify carbon fiber with graphene oxide with a lateral dimension of 50-50,000 nm, and preparing composite material with the modified carbon fiber and a resin matrix, preferably, the graphene oxide is a graphene oxide sheet, and the lateral dimension of the graphene oxide is 200-1000 nm; (3) modified carbon fiber reinforced resin matrix composite material, comprising modified carbon fiber, resin matrix and curing agent as raw materials, and the resin matrix is a thermosetting resin or a thermoplastic resin; (4) preparing method of modified carbon fiber reinforced resin-based composite material, comprising (i) uniformly mixing the resin matrix with the curing agent to obtain a mixture, and (ii) coating the mixture on the surface of the modified carbon fiber, and curing; and (5) use of modified carbon fiber reinforced resin-based composite material in preparing high-interlayer shearing performance material.