▎ 摘　　要

NOVELTY - High temperature resistant cement-based composite material comprises cement, water, sand, graphene and carboxylated carbon nanotubes, where the ratio of the graphene and carboxylated carbon nanotubes is (2:1)-(3:1). USE - High temperature resistant cement-based composite material. ADVANTAGE - The high temperature resistant cement-based composite material has excellent mechanical property, very fine particle size, excellent heat conducting property, excellent mechanical and anti-high temperature performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a high-temperature resistant cement-based composite material, which involves placing carboxylated carbon nanotubes and graphene into water, ultrasonically stirring and dispersing to obtain a first suspension, grinding the first suspension, performing ultrasonic stirring and dispersion again to obtain a second suspension, mixing and stirring cement and sand, then adding water and the second suspension and stirring to obtain product.