GCr15 steel is one of the common wearresisting and difficult processing materials,in order to study its hard cutting performance,its electric hot machining process was simulated by the finite element simulation software Deform3D.The finite element model (FEM) of electric hot machining process of GCr15 steel was built,and the influence of heating current on the wear depth of tool,the main cutting force,and the toolchip contact zone temperature was analyzed under the condition of limited cutting parameter.Experimental results show that the tool wear depth is increased gradually and then decreased with the increasing of heating current.The wear depth is reduced sharply when the heating current reaches a certain value.With the increasing of heating current,the main cutting force is decreased gradually.Especially when heating current reaches a certain value,the main cutting force is decreased obviously with linear decreasing trend.