Synchronous composite processing method of micro-hole electric sparks and different electrolytic areas and special tool of synchronous composite processing method

The invention provides a synchronous composite processing method of micro-hole electric sparks and different electrolytic areas and a special tool of the synchronous composite processing method. The synchronous composite processing method includes that a tube electrode is switched to impulse voltage, and a neutral salt solution with ultra-low concentration flows into a processing area via the inner side of the tube electrode at a high speed, and then flows out of the processing area along a gap between the tube electrode and a workpiece; an end face of the tube electrode is subjected to high-speed punch processing with axial feeding of electric sparks under the ultra-low concentration of the neutral salt solution, and a hole wall processed by the electric sparks is subjected to radical electrochemical finishing and machining under the action of low-pressure voltage. By the synchronous composite processing method, processing precision is guaranteed, punching efficiency is improved, and processing requirements on various kinds of holes of an aircraft engine are met. Different from conventional electric spark processing and electrolytic processing, the synchronous composite processing method adopts the neutral salt solution with the ultra-low concentration, so that processing efficiency in electrochemical dissolution can be greatly improved and corrosion degree of equipment can be decreased.