NOVELTY - An excrement is treated by separating solid and liquid, flocculating and dewatering, aerobic composting, treating sewage under anaerobic condition, treating sewage under facultative condition, treating sewage under facultative condition, aerobically treating sewage, bio-reacting sewage by membrane, and treating stink. The bio-reacting sewage by membrane involves transferring sewage membrane biologic tank which is filled with membrane biologic reactor; flowing sewage through micro-ports of membrane surface.    USE - Method for treating excrement (claimed).    ADVANTAGE - The method achieves 100% harmlessness, 99.7% reduction and 100% reclamation.    DETAILED DESCRIPTION - The excrement is treated by separating solid and liquid, flocculating and dewatering, aerobic composting, treating sewage under anaerobic condition, treating sewage under facultative condition, treating sewage under facultative condition, aerobically treating sewage, bio-reacting sewage by membrane, and treating stink. The separation of solid and liquid involves flowing excrement into solid-liquid separation system via sealed discharging hole to remove solid stuff whose diameter is over 10 mm, where separated solid comprises 45-70% of water; making solid into dreg by sealing separation, where dreg is used as packing by sealing transportation and solid content in sewage is less than 5% after treatment; and transferring sewage into first adjusting tank for homogeneity, uniformity and temporary storage. The flocculating and dewatering process involves transferring sewage in first adjusting tank from lift pump into flocculating reactor, and reacting with flocculating agent (0.005-0.015 wt.), where solid with diameter of less than or equal to 10 mm in sewage is mixed with colloid to make excrement flocculating constituent; extruding excrement flocculating constituent, dehydrating by flowing into spiral extruding-desiccation machine; and putting dehydrated sludge into second adjusting tank, where dehydrated excrement sludge is transferred by spiral conveyor and treated by process of aerobic composting. The aerobic composting process involves:    (A) transferring excrement to compost workshop by spiral conveyor, where water content of excrement sludge is 65-70%, and grain diameter is less than or equal to 10 mm;    (B) uniformly mixing auxiliary material (25-35% of excrement sludge) with excrement sludge in agitator, and transferring into composting groove, where auxiliary material includes plant straw, tree leaves and/or saw dust, water content of auxiliary material is less than 35%, grain diameter is less than 4 mm, and water content of compost is 55-65%; and    (C) composting compost for more than 5 days by aerobic aeration and/or aerobic inspiratory negative pressure at 55-65 degrees C, where compost is turned over once every day.    The treatment of sewage under anaerobic condition involves:    (A) transferring sewage from step (B) from second adjusting tank to reactor of up-flow anaerobic sludge bed via lift pump, where reactor of up-flow anaerobic sludge bed is filled with anaerobic sludge, sewage contains at least 10000 mg/L of anaerobic sludge, and volume loading of chemical oxygen consumption is 3-6 kg/m3;    (B) standing sewage for 1-3 days on reactor of up-flow anaerobic sludge bed so that organic material in sewage can be degraded to obtain comparatively simple and stable compound rather than complex organic compound; and    (C) releasing methane, storing methane in reservoir bag or gas holder, where residual sludge produced by improvement of anaerobic sludge returns to first adjusting tank.    The treatment of sewage under facultative condition involves transferring sewage from step (D) into facultative tank which is filled with facultative sludge and denitrifying grain packing, where content of facultative sludge in sewage is greater than or equal to 10000 mg/L, denitrifying grain packing is made by sintering of sulfur and calcium carbonate at ratio of 1:10-10:1, vol. of denitrifying grain packing is 5-15%; and standing sewage for 1-2 hours in facultative tank to remove over 90% of nitrate, where residual sludge produced by improvement of anaerobic sludge returns to first adjusting tank. The aerobically treatment of sewage involves transferring sewage from step (E) into aerobic tank which is filled with aerobic sludge ( greater than or equal to 10000 mg/L) in sewage, where oxygen rate in aerobic tank is over 2 mg/L; standing sewage for 5-10 hours in aerobic tank so that 80-90% of ammonia can be degraded and changed to nitrate nitrogen, while over 95% of organic material is degraded, where residual sludge produced by improvement the aerobic sludge returns to first adjusting tank. The bio-reacting sewage by membrane involves transferring sewage from step (F) into membrane biologic tank which is filled with membrane biologic reactor; flowing sewage through micro-ports of membrane surface, where water discharged from middle of membrane is discharged into municipal sewage pipeline, discharged water contains over 2 mg/L of dissolved oxygen, and 1/5- one half of untreated sewage by membrane reactor is returned to facultative tank in step (E). The treatment of stink involves collecting stink from solid-liquid separation system as well as first adjusting tank in step (A), flocculating reactor in step (B), and process of aerobic composting in step (C), and centrally treating using bio-treating method.