Multifunctional welding and cutting device

The utility model discloses a multifunctional welding and cutting device. Primary power supply of the three-phase mains supply for a three-phase step-down transformer is achieved through a silicon controlled regulator, taps are all arranged in the middles of three secondary windings of the three-phase step-down transformer, each of the taps is provided with an outgoing wire, the outgoing wire passes through a three-way switch and serves as a power supply negative electrode of an electrical welding machine, taps at two ends of the three secondary windings are rectified by six rectifier diodes, serve as positive electrodes of the electrical welding machine , and at the same time, also serve as power supply positive electrodes of a cutting machine, one ends of the three secondary windings are respectively connected with another three-way switch, and the other end of the three-way switch short-circuits, the other ends of the three secondary windings are respectively connected with three rectifier diodes reversely