▎ 摘　　要

NOVELTY - A repair material comprises mixture of graphene oxide, nano hydroxyapatite and collagen which are crosslinked together, where mass ratio of graphene oxide, nano hydroxyapatite and collagen is 2.5-5:20-25:100. USE - Repair material for bone tissue defect. ADVANTAGE - The repair material has porous three-dimensional structure, porosity of 90% or more, internal pores which are interconnected, better in vitro biological activity and biocompatibility and improved hydrophilicity, mechanical property and thermal stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a repair material.