【Objective】The purpose of this study is to develop high-performance copper matrix composites to meet the requirements of the braking system of high-speed trains after the operating speed is increased.【Method】The orthogonal experimental method was used to study the copper matrix composites with Cu-Ni-Si-Cr alloys as the matrix systematically, and to investigate the effects of the alloying element ratios of Ni, Cr and Si in the alloys on the mechanical properties and tribological properties of the copper matrix composites.【Result】The hardness and strength of the copper matrix composites with Cu-7Ni-1.75Si-0.75Cr as the matrix were the highest, 49.90 HBW and 171.98 MPa respectively. The results of the orthogonal experiments on the friction factor and the amount of wear were analyzed, and the comprehensive performance of the copper matrix composites with Cu-7Ni-1.75Si-0.75Cr as the matrix was the best. Its friction coefficient increases and then decreases with the increase of temperature under the condition of 25~650 ℃, and the amount of wear increases, and the highest friction coefficient of copper matrix composites is found at 450 ℃. The wear mechanism changes from abrasive wear to oxidative wear and abrasive wear.【Conclusion】The alloying of copper matrix by orthogonal experimental method is of great significance to effectively improve the friction factor and wear resistance of copper matrix composites for brake pads at high temperatures.