The invention relates to a rotary internal liquid flushing cutter handle device used for arc discharge explosion corrosion removing milling. The rotary internal liquid flushing cutter handle device comprises a cutter handle shaft structure, an internal liquid flushing box structure and an electrode clamping structure; a cutter handle shaft of the cutter handle shaft structure can be matched with acommon machining center and a machine tool to achieve quick cutter replacement; the internal liquid flushing box structure has a liquid fluid design, high-speed flushing liquid guarantees the arc breaking and cooling effects of between-electrode discharge zones; and clamped electrodes are of single-hole or multi-hole equal-cross section structures. By means of the structure of the device, two mechanisms including mechanical motion arc breaking and fluid power arc breaking in arc discharge machining are achieved on the principle, and efficient implementation of arc discharge machining is guaranteed. In addition, the cutter replacing structure in standard design enables the device to be compatible to the common machining center and the machine tool, arc discharge explosion corrosion removing milling (arc discharge milling) and high-speed milling machining can be combined, the part machining efficiency is improved, and the arc milling machining applicable scope is enlarged.