The invention discloses a
microwave generating device and a
microwave high-temperature air pressure device with the
microwave generating device. The microwave generating device comprises a microwave source, a
wave transmission pressure-resistant element and a pressure-resistant
waveguide, wherein the microwave source is used for giving out microwaves, the
wave transmission pressure-resistant element is used for bearing the pressure and transmitting the microwaves, the pressure-resistant
waveguide is used for bearing the pressure, transmitting electromagnetic
waves and feeding back energy, an
energy feedback antenna of the microwave source is arranged in the
wave transmission pressure-resistant element, the
energy feedback antenna and the wave transmission pressure-resistant element are simultaneously connected into the
waveguide, the inner wall surface of the pressure-resistant waveguide defines and forms a microwave
resonant cavity so that the microwaves generated by the microwave source can enter the pressure-resistant waveguide through the wave transmission pressure-resistant element, and the
resonance is formed in the pressure-resistant waveguide and is transmitted to a target cavity. Through a combined structure of the wave transmission pressure-resistant element and the pressure-resistant waveguide, the
pressure resistance in the
microwave transmission position is realized, the air pressure outward leakage condition can be effectively prevented, the air pressure and the inside temperature of the target cavity are ensured, and the microwave
source function failure caused when
airflow enters the microwave source through the pressure-resistant waveguide can be effectively prevented.