The invention provides a quasi-solid-state single line laser radar based on an MEMS-like galvanometer, and an operating method of the quasi-solid-state single line laser radar. The quasi-solid-state single line laser radar comprises a laser device, a detector and a galvanometer, wherein the galvanometer comprises a base, magnets, a coil, a reflector, a torsion bar and a fixing member; the magnets are arranged on two opposite sides of the base separately, and the polarities of the isolated magnets at opposite positions are opposite; two ends of the coil are connected with an alternating current; the reflector is connected with the coil; the reflector reflects detection light emitted by the laser device to a detected object, and the detection light on the detected object enters the detector after passing through the reflector; one end of the torsion bar is fixed on the base by means of the fixing member, and the other end is connected with the coil; and the coil generates torque in a magnetic field formed by the magnets under the driving of the alternating current, so as to drive the reflector to twist by taking the torsion bar as an axis. The quasi-solid-state single line laser radar has the advantages of simple structure, low cost and the like.