A laser cleaning head comprises a pulse laser source, a transmitting energy fiber, a collimator and a reflector, wherein the pulse laser source is used for outputting a pulse laser beam; one end of the transmitting energy fiber is connected with the pulse laser source, and the transmitting energy fiber is used for transmitting the pulse laser beam; the collimator is connected with the other end of the transmitting energy fiber and used for collimating the pulse laser beam; the reflector is used for emitting the pulse laser beam to the surface of a cleaned sample piece. Thus, the laser cleaning head is simple in structure and convenient to operate. A tunable focusing light beam reflector is used as the reflector and can conduct focusing shaping on the light beam while reflecting the laser light beam. The emitted light beam can become a high-power rectangular light beam. Accordingly, the light beam emitted onto the surface of a cleaned article is a line beam, and a line spot surface. Thus, the cleaning range is large. Tiny gaps occur when points and spots are connected in a traditional cleaning mode are avoided. The overall cleaning effect is improved.