NOVELTY - The waste heat producing marsh gas recycling device comprises a raw material regulating pool, a raw material preparing tank stirrer, a raw material pump, a raw material heater, a secondary raw material heater, an anaerobic fermenting tank, an anaerobic tank heater, a secondary fermentation tank and gas storage cabinet, residue slurry tank, a biogas residue and biogas conveying pump, a hot water boiler and a hot water circulating pump, where the raw material regulating pool is connected with the anaerobic fermentation tank through a raw material conveying pipeline.    USE - Used as a waste heat producing marsh gas recycling device (claimed).    ADVANTAGE - The device is environmental friendly and cost-effective and energy saving.    DETAILED DESCRIPTION - The waste heat producing marsh gas recycling device comprises a raw material regulating pool, a raw material preparing tank stirrer, a raw material pump, a raw material heater, a secondary raw material heater, an anaerobic fermenting tank, an anaerobic tank heater, a secondary fermentation tank and gas storage cabinet, residue slurry tank, a biogas residue and biogas conveying pump, a hot water boiler and a hot water circulating pump, where the raw material regulating pool is connected with the anaerobic fermentation tank through a raw material conveying pipeline, a hot water supply pipeline, a hot water return pipeline and a residue slurry pipeline. The anaerobic fermentation tank is connected with the gas storage cabinet through a pipeline. The secondary fermentation tank is provided with a marsh gas storage cabinet export pipeline. The secondary fermentation tank and the gas storage cabinet are connected with the biogas tank through the biogas conveying pipeline, biogas residue biogas liquid conveying pipeline and a discharging pipeline. The secondary fermentation tank discharge valve is connected with a raw material inlet, which is connected with a secondary raw material heater hot water outlet valve. A raw material heater hot water inlet valve and an anaerobic fermenting tank discharge valve are connected with an anaerobic tank stirrer. An INDEPENDENT CLAIM is included for use of waste heat producing marsh gas recycling method.