The utility model discloses a microwave frequency conversion power, which comprises a pedestal and a case body, the box sets up on base upper portion, box both sides lateral wall middle part is provided with cooling fan respectively, the box has set gradually an aluminum plate layer, the 2nd aluminum plate layer and heat conduction resin layer outside from in to, the inside square cavity that is provided with of heat conduction resin layer, be provided with variable frequency power supply in the square cavity, be provided with 5mm's interval between an aluminum plate layer and the 2nd aluminum plate layer, an aluminum plate layer is blinds structure. In this way, microwave frequency conversion power, through the special design who arranges variable frequency power supply at heat conduction resin layer inner chamber, have the function of sealed, heat conduction, dustproof, waterproof and protection, solved the radiating problem of variable frequency power supply promptly, variable frequency power supply's safety protection effect has improved again.