NOVELTY - A temperature control device of marsh gas generator comprises a marsh gas generator, a solar energy heat collecting device, a marsh gas boiler, a heat storage pool, a heat exchange tube, a temperature sensor, a temperature controller, an electromagnetic valve, and a sunlight greenhouse; where the marsh gas generator is provided with heat exchange tube and temperature sensor; the sunlight greenhouse is covered in the marsh gas generator, temperature controller, and heat storage pool; and the heat storage pool runs through the sunlight greenhouse through pipeline.    USE - The temperature control device of marsh gas generator is useful for anaerobic fermenting of marsh gas generator at high temperature and steady condition.    ADVANTAGE - The temperature control device of marsh gas generator makes use of solar energy to heat and to insulate with the marsh gas generator; where the marsh gas generator is installed in the glass sunlight greenhouse; the high environment temperature of the marsh gas generator is kept by the greenhouse effect; the external side of the marsh gas generator is stuck with insulation material to reduce loss of the heat in the marsh gas generator; and the light-absorbing powder is coated at external surface of the marsh gas generator to increase absorption of the solar energy.    DETAILED DESCRIPTION - A temperature control device of marsh gas generator comprises a marsh gas generator, a solar energy heat collecting device, a marsh gas boiler, a heat storage pool, a heat exchange tube, a temperature sensor, a temperature controller, an electromagnetic valve, and a sunlight greenhouse; where the marsh gas generator is provided with heat exchange tube and temperature sensor; the sunlight greenhouse is covered in the marsh gas generator, temperature controller, and heat storage pool; the heat storage pool runs through the sunlight greenhouse through pipeline to connect with the marsh gas storing jar; one port of the heat exchanger runs through the marsh gas generator through the pipeline to connect with electromagnetic valves, and is respectively connected with running water tube, heat storage pool and marsh gas boiler through the electromagnetic valve; another port of the heat exchanger runs through the marsh gas generator through the pipeline to connect with electromagnetic valve and circular pump; the electromagnetic valve is connected with running water tube; the circular pump is connected with electromagnetic valves, and is also connected with the heat storage pool and the marsh gas boiler through the electromagnetic valve; the temperature sensor runs through the marsh gas generator to connect with the temperature controller, which is also connected with alternating current contactor; and the alternating current contactor is respectively and electrically connected with each corresponding electromagnetic valve.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the temperature control device of marsh gas generator.