Ion coating technology (PVD) is one of the most advanced surface engineering technologies, among which, the third generation technique of ion coating, plasma accelerator method, is its most sophisticated technique. Because of the high production efficiency, low cost, simple operation and pollution free and other features, the ion coating equipment with the application of this technique has been gradually known and accepted by people, and in the field of tool coating and decorative coating, ion coating will not only gradually replace traditional electroplating but also greatly improve and optimize the chemical and physical indexes of the coating.