Laser cladding method and system

The invention relates to a laser cladding method and system. The method comprises the steps that the current defocusing amount, the light spot focus and the collimation air pressure are acquired; a processing point of the current defocusing amount is determined by taking the light spot focus as a reference point; the diameter of the light spot is determined according to the current defocusing amount; the diameter of a powder spot is determined according to the collimation air pressure; the collimation air pressure is adjusted to enable the diameter of the powder spot to be smaller than that ofthe light spot, it is determined that a laser cladding device is in a light-powder coupling mode; and laser cladding is carried out on a straight wall thin-walled workpiece according to the light powder coupling mode. According to the laser cladding method and the system, the quality of the surface of a laser cladding formed part is improved. 本发明涉及一种激光熔覆方法及系统。所述方法包括：获取当前离焦量、光斑焦点和准直气压；以所述光斑焦点为参考点，确定所述当前离焦量的加工点；根据所述当前离焦量确定