The embodiments of the present invention discloses a microelectronic switch comprising: a gate electrode; a source electrode; a drain electrode; a first electrostatic electrode; a cantilever with two working positions of an open position and a close position; a connecting portion arranged at the cantilever; a second electrostatic electrode arranged at the cantilever, the second electrostatic electrode is electrically connected with the gate electrode and is arranged opposite to the first electrostatic electrode; an insulating dielectric layer arranged between the first electrostatic electrode and the second electrostatic electrode; the cantilever is located at one working position of the two working positions when the voltage applied by the gate electrode to the second electrostatic electrode is less than a preset threshold, the cantilever is switched to the other working position of the two working positions when said voltage is greater than the preset threshold.