PCB (Printed Circuit Board) welding equipment

The invention relates to the technical field of a circuit board surface mounting technology and provides PCB (Printed Circuit Board) welding equipment. The welding equipment comprises a spraying device, a pre-heating device and a welding device, wherein the pre-heating device is connected with the spraying device and the welding device respectively; a spraying head of the spraying device can be movably controlled; the pre-heating device is a single heating device; the position of a soldering tin spraying nozzle of the welding device can be movably controlled according to a PCB; and the PCB enters the welding device to be welded after a soldering flux is sprayed on the PCB through the spraying device and the PCB is pre-heated through the pre-heating device. The spraying head of the spraying device and the spraying nozzle of a welding module are moved according to displacement coordinates so that welding technological parameter data is flexible and changeable; and the size and quantity of the soldering flux spr