The turbine disk slot is an important structure on the turbine disk of aircraft engines， and electrochemical broaching is a potential solution to achieve efficient and low-cost manufacturing of this structure. In order to study the influence of electrochemical broaching machining parameters on contour accuracy and surface quality， a multi field coupling model for electrochemical broaching is established. The influence of tool cathode length on the distribution of machining gap products is elucidated， and the preferable length parameter is obtained. Experiments on planar electrochemical broaching are conducted to explore the influence of feed speed and machining clearance on the surface quality and profile difference in import and export removal amount of the workpiece， and optimal machining parameters are determined. The experimental results indicate that using optimized processing parameters can achieve good surface quality and effectively control the difference in import and export removal amount of the profile. Finally， electrochemical broaching experiments are conducted on a single component of a typical turbine disk slot structure using optimized parameters， and the specimens exhibit good surface quality and contour repeatability accuracy.