Laser mold welding machines are specially designed for the mold industry and are used to repair precision molds. Through mold repair, the original mold can be fully utilized again, greatly saving production costs and improving work efficiency. This technology can also be used to modify the design or size of the mold to shorten the product development cycle. Laser mold repair technology effectively handles all small parts of welding and repair work, making up for the shortcomings of traditional argon arc welding technology in repairing and welding fine surfaces, avoiding the two thresholds of thermal strain and post-processing, and greatly saving the production cycle of the mold.