Natural gas heating furnace

The invention discloses a natural gas heating furnace, which comprises a hearth, wherein the hearth is arranged on a support frame, a plurality of natural gas burning nozzles are arranged at two sides inside the hearth and are connected with a natural gas pipeline or a natural gas cylinder, and the natural gas heating furnace also comprises a temperature control system, wherein the temperature control system comprises a thermocouple, a temperature instrument, a host machine, a control circuit, a proportional valve and an electromagnetic valve, the thermocouple is connected with the temperature instrument, the temperature instrument is respectively connected with the host machine and the control circuit, the control circuit is respectively connected with the host machine, the proportional valve and the electromagnetic valve, the proportional valve and the electromagnetic valve are respectively connected with the natural gas burning nozzles, and the electromagnetic valve is connected with the natural gas pipeline or the natural gas cylinder. The heating furnace is provided with a precise temperature control system and has the advantages that the temperature is stable, and the quality of produced products is high.