测定了高速走丝电火花线切割加工中添加电解质的工作液电导率与加工效率及表面粗糙度的关系，表明随着电导率增加，工件表面粗糙度下降，加工效率存在最佳值。通过测定电极丝的损耗曲线，证实工作液的电解镀覆作用能减少电极丝的损耗和增加其寿命。 The relationship between conductivity, working efficiency and surface roughness of the working solution added with high-speed wire electric discharge machining was measured. It shows that with the increase of electrical conductivity, the surface roughness of the workpiece decreases and the machining efficiency has the best value. By measuring the loss curve of the electrode wire, it was confirmed that the electrolytic plating action of the working fluid can reduce the loss of the electrode wire and increase its life.