The invention provides an end-pumped high-power laser which comprises a pumping source, a gain medium and a laser resonant cavity, wherein a gradient doped crystal is served as the gain medium, and the doping concentration of the crystal is lowest at the pumping end surface of the gain medium; the doping concentration of the crystal is higher and higher as the position of the crystal in the gain medium is far away from the pumping end surface; and the doping concentration is highest at the non-pumping end surface of the gain medium. The end-pumped high-power laser of the invention adopts the gradient doped crystal as the gain medium and has good light beam quality, high light-light conversion efficiency and compact structure.