Abstract: In order to solve the problems in NC electrochemical machining(ECM)of integral components,a NC-ECM CAD/CAM platform which employs the method of engineering database integration is constructed.The key problems on modeling,data processing,ECM simulation,NC motion simulation,programming and parameter optimization are solved by database,FEM and numerical control technology.The CAD/CAM platform has been applied in the electrochemical machining of integral components such as the integral impeller and the compressor stator.The practical application results showed that the process preparation time is shortened and the success rate of process testing is improved with the benefit of the NC-ECM/CAD CAM platform.