Energy-saving module welding device

The utility model relates to a welding device which comprises a bottom plate, an installation groove is formed in the upper surface of the bottom plate, metal plate filler strips are installed on the surfaces of the two sides of the bottom in the installation groove, a PCB jointed board is installed on the upper surfaces of the metal plate filler strips, and pin assemblies are arranged on the two sides of the PCB jointed board. According to the utility model, through the arrangement of the contact pin assemblies, the contact pins are very small in size and very inconvenient to take by hands, so that the contact pins are divided into one group and are designed into a pin header form, welding can be carried out only by putting the contact pin assemblies into the mounting grooves of the bottom plate and then installing the PCB jointed board, and the contact pin assemblies are taken out after welding. And in addition, a plurality of positioning grooves are formed in the bottom of the bottom plate, so that positio