The present invention discloses a non-invasive electric hair-taking apparatus comprising a shell (2) and a cover (3) connected with each other by a latch (13) to form a handle (14); a step (15) being arranged at the front end of the handle (14). Said shell (2) is comprised of a front chamber, a middle chamber and a rear chamber; a motor (4) being mounted in the front chamber, a switch (6) being mounted on the wall of the middle chamber, a battery (5) being mounted in the rear chamber. Said motor (4), switch (6) and battery (5) forming a circuit by wiring (8). A hair-taking knife (1) is mounted at the front end of a connector (10) that is mounted on the shaft of the motor (4). Said connector (10) being fixedly positioned at the front end of the handle (14) via a locating ring (11) which is engaged with the step (15).