Cascade type plasma generator

The invention belongs to the plasma technology, and particularly relates to a cascade type plasma generator. The generator comprises a cathode assembly, a cathode seat, an anode, a cathode seat and an anode cascade plate. The cathode seat and the cascade plates are coaxially mounted, the cathode seat is fixedly connected with the cascade plates below the cathode seat through the screw rod, and the insulating sleeve is wrapped outside the connecting screw rod. Each part of the cascaded plasma generator is provided with a cooling channel, and the parts are independently water-cooled and do not interfere with each other, so the parts are convenient to independently disassemble, assemble and maintain; a cascade plate is adopted for transition between the cathode and the anode, when the equipment works, working gas is ionized between the cathode and the anode to form plasmas, electrons are emitted from a cathode head 23, accelerated by an electric field and then fall on the cascade plate, the cascade plate is adop