The invention provides a light spot shaping and homogenization method and a laser infrared lighter; and the method comprises the following steps that: a light beam is shaped and homogenized by a conical mirror. In the embodiment of the invention, the conical mirror can shape and homogenize the light beam by light spot mixing and overlaying. Compared with traditional homogenization methods, the invention obtains better homogenization effect. In addition, the conical mirror can be a cone or a pyramid, and selection methods are quite diversified.