Vehicle-mounted microwave oven

A vehicle-mounted microwave oven mainly comprises a metal cavity, a magnetron, a rectangular waveguide, a metal stirrer, a variable-frequency power supply, a lithium battery pack and the like. The vehicle-mounted microwave oven is powered by a lithium battery, and the output power is 400-700W. The vehicle-mounted microwave oven adopts a top upward opening structure, a metal cavity below a door body is a square pressing groove and is integrally formed, and a pressing mold for placing a stirrer and a step for placing a ceramic plate are arranged at the bottom of the square pressing groove of the metal cavity. The square pressing groove of the metal cavity has a larger inclination angle in the door opening direction relative to the other three directions, so that a user can take and place food conveniently. According to the vehicle-mounted microwave oven, the lithium battery is adopted as a mobile power supply, convenience is provided for heating food at any time in the outdoor travel process of people, and conv