Reactive power industrial power-saving device

The invention discloses a reactive power industrial power-saving device, which comprises a first production system, a CPU (Central Processing Unit), a reactive power generator, a surge protector and acompensation capacitor. The first production system comprises first production equipment, and second production equipment which carries out reactive power compensation with the first production equipment and is connected with the first production equipment. The beneficial effects of the device are that the input end of the CPU is connected with a current and voltage signal of a main loop throughan outgoing line, and each phase of current of a power supply network can be sampled and detected; and the CPU is connected with the reactive power generator, the surge protector, a voltage stabilization module and a fuse, reactive compensation is carried out on a three-phase power grid according to the detected power factor or reactive power, the reactive power compensation function, the surge protection function and the