Machining difficult-to-machine materials is a concern for researchers today. To process difficult-to-machine materials, researchers have focused on introducing many new machining methods: Ultrasonic machining, abrasive water jet machining, electrochemical machining, electric spark machining, laser beam machining... Electrochemical grinding is a new direction that is being widely developed in advanced countries. In Vietnam, in recent years, electrochemical grinding has been receiving attention in research, but it has not been widely applied in production