The utility model relates to an exhaust gas burner, which is characterized in that it comprises a main body; The bottom of the main body is connected with an air inlet pipe, the air inlet pipe is connected with a heating pipe arranged inside the main body, the top of the main body is connected with a disposal cavity, and the heating pipe is connected with the disposal cavity.

   A filter plate is arranged inside the disposal chamber, a slide rail is arranged at the top of the filter plate, a lime bearing tray which can slide along the slide rail is arranged at the top of the slide rail, and an air outlet pipe is connected at the top of the disposal chamber.

   A first air outlet valve is arranged on the air outlet pipe, the air outlet pipe is connected with the air inlet pipe through the air return pipe, a flame emitter is arranged on the inner end face of the main body, and a heat transfer pipe is sleeved outside the heating pipe.

   The heat conduction pipe is electrically connected with an electronic heater arranged outside the main body, the air return pipe is provided with a second air outlet valve, and both the second air outlet valve and the first air outlet valve are electrically connected with the solenoid valve controller.