With quantitative calculation of ventilation and temperature-rise for locomotive brake resistance, this paper estimates the rationality of matching of ventilator and ventilation system of locomotive brake resistance, and the reliability of brake resistance ribbon, to optimize the design of locomotive brake resistance. 对机车制动电阻通风和电阻带温升进行定量计算,从而判断通风机和制动电阻通风系统匹配的合理性和电阻带工作的可靠性,对制动电阻优化设计具有一定的指导意义。