The machining process of ECM is very complex, and involves various physical fields, such as flow, electric and thermal field. Thus the machining process is very difficult to forecast. The mainstream computer simulation software is COMSOL. According to the simulation results, it is obvious to get the machining process in advance, and conduct the experiment for proofing the simulation results. The merits, such as high efficien cy and non-residual stress will make the application of ECM in turbine blade be more extensive.