NOVELTY - A sludge comprehensive treatment method involves performing anaerobic digestion of sludge by pumping sludge into an anaerobic digestion reactor from a sewage processing unit for digesting. The digested sludge is dehydrated and dried. Pyrolysis of the sludge is performed by transporting the dried sludge to a pyrolysis reactor. Pyrolytic hydrocarbon compounds, carbon monoxide gas and phase flow heat liquefied pyrolytic carbon are produced. Pyrolysis oil is prepared by cooling the hydrocarbon with water and stored in an oil reservoir. The pyrolytic carbon is stored in a carbon storage chamber.    USE - Method for comprehensive treatment of sludge of urban domestic sewage treatment plant, paper-making industry, leather industry, printing industry and dyeing industry.    ADVANTAGE - The method enables effectively utilizing energy of the sludge, reducing sludge volume and storage and transportation problems, improving energy recycle rate and harmlessness degree and reducing secondary sludge and operation cost.    DETAILED DESCRIPTION - A sludge comprehensive treatment method involves performing anaerobic digestion of sludge by pumping sludge into an anaerobic digestion reactor from a sewage processing unit for digesting, and converting generated biogas into electric energy and heat energy. The digested sludge is fed to a mechanical dewatering machine for dehydrating and transported to a thermal drying machine for drying the sludge, where water content of dried sludge is 5-10%. Pyrolysis of the sludge is performed by transporting the dried sludge to a pyrolysis reactor and controlling temperature at 500-600 degrees C for 10-40 minutes. Pyrolytic hydrocarbon compounds, carbon monoxide gas, carbon dioxide gas and phase flow heat liquefied pyrolytic carbon are produced by the sludge. Pyrolysis oil is prepared by cooling the hydrocarbon with water and stored in an oil reservoir. The pyrolytic carbon is stored in a carbon storage chamber. An INDEPENDENT CLAIM is also included for a method for recycling a transforming object.