NOVELTY - Environmental friendly comprehensive utilization of methane produced from night soil, comprises feeding night soil into a distillation, dehydration and dryness machine, and igniting methane to heat the night soil liquid in boiler till reaching more than boiling point. Moisture of night soil is evaporated and condensed into distilled water, which obliquely flows into a hopper in connection with a field, which is irrigated by purified sewage. After night soil liquid is dehydrated into solid powder, no distilled water flows through refrigeration pipeline.    USE - Environmental friendly comprehensive utilization of methane produced from night soil by distillation, dehydration and dryness.    ADVANTAGE - The method implements circulator utilization, and methane extraction for boiler combustion. Night soil is recycled for production of energy source and fertilizer, thus bringing economic benefits and greening the environment.    DETAILED DESCRIPTION - Environmental friendly comprehensive utilization of methane produced from night soil, comprises feeding night soil into a distillation, dehydration and dryness machine by a night soil pump pipeline at a bottom layer of a huge sewage storage sump. A boiler is full of night soil, a floating ball floats upwards and a vertical rod jacks a power switch so that a 220 V to 150 W red bulb emits light reflecting that the boiler is full of night soil liquid, a water pump power switch turns off, while a pipeline valve of the pump closes. Methane is ignited to heat the night soil liquid in boiler till the night soil liquid reaches more than boiling point. Moisture of the night soil is evaporated and then condensed by a refrigeration pipeline via an n-shaped pipeline into distilled water, which obliquely flows into a hopper in connection with a field, which is irrigated by purified sewage via a pipeline. After the night soil liquid of the boiler is dehydrated into solid powder, no distilled water flows through the refrigeration pipeline, and an iron cover on the tail end of the refrigeration pipeline generates a force against its transverse rod, which turns on a 220 V power switch for electric shock. A power switch of a refrigerator turns off, while a methane valve closes for combustion interruption. An upper propeller shaft rod at the bottom of the boiler is connected with a reducer motor, a power supply turns on and then the propeller slowly runs to open a valve under the bottom of the tail end of the boiler, so the night soil solid powder is extruded out.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic flow diagram of a system for environmental friendly comprehensive utilization of methane produced from night soil.