Portable electric spark nesting screwtap fetching tool machine

A portable electric spark trepanning screw tap-taking machine tool comprises a base, an upright post, a lifting arm, a rotating seat, a component of a main shaft head, and the like, wherein a main shaft is driven to rotate by an electric rotating motor; the component of the main shaft head carries out servo feed by a servomotor through lead screw drive; the main shaft clamps an electrode so as to carry out electric spark machining to a workpiece; the lifting arm can rotate around the upright post and can also be lifted along the upright post; and the component of the main shaft head can rotate around the rotating seat. The base is provided with a magnet or an electromagnet; therefore, when the machine tool is in a right place of the workpiece, the magnet or the electromagnet can be switched on to ensure that the machine tool is firmly sucked at the workpiece; in this way, the machine tool can carry out electric spark removal of broken screw tap, drill bit, reamer, bolt, and the like inside any complex workpie