NOVELTY - Pyrolysis of garbage comprising performing pyrolysis in double cylinder rotary pyrolysis kiln including pyrolysis channel, ash slag return channel, feeding device, kiln head cover, discharging waste gas interface, garbage slag outlet, kiln tail cover, composite gas leading-out pipe, hot air leading-in interface, hot combustion channel, burner channel set with compensating heat of cement production line, rotary cement kiln including kiln head and kiln tail part, and several burners installed on kiln head clinker cooler.    USE - Pyrolysis of garbage.    ADVANTAGE - The use of pyrolysis in double cylinder rotary pyrolysis kiln for pyrolysis of garbage effectively prevent waste incineration process dioxin conditions, efficiently uses garbage heat, and totally recycle waste slag.    DETAILED DESCRIPTION - Pyrolysis of garbage comprising performing pyrolysis in double cylinder rotary pyrolysis kiln including pyrolysis channel, ash slag return channel, feeding device, kiln head cover, discharging waste gas interface, garbage slag outlet, kiln tail cover, composite gas leading-out pipe, hot air leading-in interface, hot combustion channel, burner channel set with compensating heat of cement production line, rotary cement kiln including kiln head and kiln tail part, and several burners installed on kiln head clinker cooler. The cooler comprises hot air outlet and hot clinker inlet, and is connected with cement rotary kiln head decomposing furnace. The decomposing furnace includes upper air outlet and lower air inlet, and connected with cement kiln tail part, side port, side feeding port, and pre-heater. The air inlet predecomposition furnace is connected to air outlet, and discharge port connected with cement rotary kiln. The kiln also includes oxidation device including distribution pipe, which is connected with several burners, channel and oxygen branch pipe connected with hot air burner, and three process connecting pipeline; clinker cooling machine connected to hot air outlet of kiln tail of heating wind leading-in interface. The composite gas pipe connects several burners and other cover of composite gas leading-out tube, and composite gas shunt pipe for connecting other end with cover of burner with composite gas leading-out pipe of waste gas waste heat pipeline. The pre-decomposition furnace is connected to side inlet, hot air kiln head cover waste gas interface, and garbage slag pipe. It is also connected with feeding port and kiln head cover of garbage slag outlet.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of double cylinder rotary pyrolysis kiln.