▎ 摘　　要

NOVELTY - Preparing high-strength copper-based alloy material involves using 97 wt.% pure copper ingot, 1 wt.% pure antimony ingot, 1 wt.% pure tantalum powder, and 1 wt.% graphene powder as raw materials, mixing pure copper ingot and pure antimony ingot, and heating to 1300 degrees C, for 10 minutes to melt. The melt liquid surface is protected by argon gas, and pure tantalum powder and graphene powder are added, under stirring for 5 minutes, and alloy melt temperature is lowered to 1200 degrees C, and kept for 10-15 minutes, and solidified to obtain semi solid product. The obatined semi solid product is cast into grinding tool cooled by circulating water to prepare an ingot, which is cooled to room temperature at a rate of 190 degrees C/minute to obtain final product, where pure niobium powder has a diameter of 0.05-100 mu m. USE - Method for preparing high-strength copper-based alloy material. ADVANTAGE - The method enables to prepare high-strength copper-based alloy material has high intensity.