Abstract: In a laser cladding method, a laser beam is emitted from a semiconductor laser to melt alloy powder for laser cladding on the surface of a hydraulic support column. The semiconductor laser is a laser functioning with semiconductor material as gain medium and lighting by means of semiconductor material transition among energy bands. The hydraulic support column is mainly made of alloy steel of 27 SiMn. With the laser cladding method, the energy absorption efficiency of laser beam can be increased, and the energy utilization efficiency is increased, so that the power consumption is saved reduced.