The spot welding machine adopts AC pulse power supply, low cost, cumulative output power, copper wire welding power supply, internal voltage stabilization device, to ensure that the output current is constant, and the welding quality is consistent; Using single-chip microcomputer control, it can realize single-pulse, double-pulse and multi-pulse welding, and the welding parameters are digitally adjustable, and the manual control is more flexible. The pulp molded steel mesh mold made by the spot welding machine has a beautiful appearance, uniform welding joints, small sparks, no blackening, and at the same time, it also saves the grinding process, improves the operation efficiency, and helps manufacturers to achieve cost and efficiency, which has been recognized and trusted by Eurasian Equipment, Daoxiang Environmental Protection, Shandong Shengquan, Yongfa, Greenlink Biology and other enterprises