▎ 摘　　要

NOVELTY - The utility model claims a power device for preparing graphene, comprising the first power supply, a second power supply, the input switch circuit and the output switch circuit, the first switch control circuit, a second switch control circuit and singlechip; first power supply and the second power supply are electrically connected with the input end of the input switch circuit, an input switch circuit output end electrically connected with the input end of the output switch circuit and the output switch circuit comprises an output end A and the output end B, the first switch control circuit and the second switch control circuit electrically connected both with the input switch circuit control end, first switch control circuit and the second switch control circuit are electrically connected with the single-chip microcomputer. The utility model has simple structure, saves the cost and can improve the characteristics of the graphene yield.