The present application provides a
driving circuit for a magnetron, and a heating device. The
driving circuit for a magnetron comprises: a rectification circuit, a first output terminal of the rectification circuit being configured to be connected to an
anode of a magnetron, a second output terminal of the rectification circuit being configured to be connected to a ground terminal of the magnetron, and the rectification circuit being configured to convert an
alternating current into a
direct current so as to supply power to the magnetron; a
transformer, a primary coil of the
transformer being configured to be connected to an
alternating current power supply terminal or an
inverter circuit, a first terminal of a first secondary coil of the
transformer being configured to be connected to a
cathode of the magnetron, a second terminal of the first secondary coil of the transformer being configured to be connected to the
anode of the magnetron, a second secondary coil of the transformer being connected to the rectification circuit, and the transformer being configured to provide an
alternating current for the rectification circuit, and a component having a
variable resistance value, the component being located in a circuit path formed by the first secondary coil, the
anode of the magnetron, and the
cathode of the magnetron and configured to limit a current flowing through the magnetron, and the resistance value of the component is positively correlated with the temperature of the component.