Beam shaping method and beam shaping device

The invention belongs to the technical field of laser application, and particularly relates to a beam shaping method and a beam shaping device.The beam shaping method comprises the steps that Gaussian beams are expanded and collimated through a zoom beam expander; the collimated Gaussian beam vertically enters the beam shaper by taking the pre-alignment mark on the beam shaper as a target; a light spot analyzer is arranged in the transmission direction of the light path, and a light spot image, an X-axis energy curve and a Y-axis energy curve are obtained through the light spot analyzer; adjusting the magnification of the zoom beam expander and/or the position of the beam shaper in the X-axis direction and the Y-axis direction; taking a normal from the center of the light spot to the corresponding axis as a symmetry axis, and finishing debugging when a difference value between any two symmetrical points is smaller than a preset value. The magnification of the zoom beam expander is adjusted according to the li