本文阐述了我国新一代功率最大的SS4型八轴干线货运电力机车样机的基本特点与特性曲线。文中着重介绍了该型机车的基本参数、采用的新技术、新工艺、新材料、具有恒压、恒流双面控制性能的牵引特性、制动能力和具有恒速、恒激磁控制性能的宽速域的电阻制动特性等。 This article elaborates the basic characteristics and characteristic curves of a prototype of the SS4 eight-axle freight electric locomotive prototype with the largest power generation in our country. This paper introduces the basic parameters of the locomotive, the use of new technologies, new processes, new materials, with constant pressure, constant current double-sided traction control performance characteristics, braking capacity and constant speed, constant excitation control performance wide Resistance braking in speed domain and so on.