The invention relates to a high and lower beam integrated headlamp based on a laser source. The headlamp comprises a light source reflection rotating mechanism, a high and lower beam reflection mirror and the laser source; the laser source comprises six blue laser diodes with the wavelength of 450 nm, an optical fiber and quartz substrate waveguide chip and a yellow fluorescent powder prism; the light source reflection mechanism comprises a framework wound with an electromagnetic coil, a magnet, an ejection rod and a light source reflection mirror, the rear middle portion of the light source reflection mirror is hinged to a lamp body, the rear lower portion of the light source reflection mirror is provided with a spherical head sleeve which is connected with a spherical head on the inner side of the ejection rod and can rotate relative to the spherical head, a spring arranged on the ejection rod in a sleeving manner ejects the framework and a convex shoulder of the ejection rod, and the high and lower beam reflection mirror comprises an upper lower beam reflection face and a lower high beam reflection face which are formed through description of the middle of the mirror. The laser source is adopted to meet the light distribution requirements of the high beam and the lower beam at the same time, through beam changing, switching of the high beam and the lower beam is achieved, the size and the weight of the headlamp are reduced, and vibration resistance and damage-resisting capacity of the light source are improved.