▎ 摘　　要

NOVELTY - The utility model claims a graphene reducing technique for microwave preparation device, comprising a microwave generating system and a resonant cavity, the microwave generating system comprises a microwave generator, waveguide circulator and absorbing load; microwave generator connected through the waveguide and the resonant cavity, the waveguide is respectively fixed with a circulator and absorbing load, the resonant cavity is provided with a sealed pipe, sealing pipe is a sealed pipe made of quartz glass, sealing pipeline connected to a charging device, sealing pipeline is provided with a valve, valve connected with a separator, a separator connected to a collector, a valve is equipped with an automatic adjusting device.