The invention provides an adjustable dual-optical-wedge laser scanning performing mechanism based on a cantilever beam structure. The adjustable dual-optical-wedge laser scanning performing mechanism comprises an upper end cap, an upper optical wedge support arm, a lower optical wedge support arm, a high motor support body, a low motor support body, a high motor output gear, an upper optical wedge bearing transmission gear, an upper optical wedge high speed bearing, a high micro-motor, a low micro-motor, an upper optical wedge, a lower optical wedge, a lower optical wedge bearing transmission gear, a low motor output gear and a lower optical wedge high speed bearing. The upper end cap and the high motor support body are respectively provided with a fine adjustment set screw and a fine adjustment bolt which apply force to the upper optical wedge support arm and the lower optical wedge support arm so as to realize a fine adjustment function of the position and the axial deflection angle of the upper optical wedge and the lower optical wedge. The high micro-motor and the low micro-motor respectively drive the upper optical wedge and the lower optical wedge to relatively rotate around the common optical axis, wherein rotation is different in speed and opposite in direction, so that scanning paths of different speed ratios are generated. The adjustable dual-optical-wedge laser scanning performing mechanism has the advantages of being small in size, adjustable in optical wedge axial inclination angle and reliable in structure so that scanning and imaging distortion caused by installation error of the optical wedges can be avoided, and the adjustable dual-optical-wedge laser scanning performing mechanism is suitable for the field of flexible and high speed application.