NOVELTY - Device comprises a reaction tank (1), kitchen waste (2), an upper temperature controller (3), a lower temperature controller (4), a leachate exporting tube (5), a condenser, an oxygen detector, an ammonia capturing trap, an air flow meter, an air compression pump, an air guide tube, a reaction tank cover, a waste air conduit and an air distribution plate. The reaction tank is internally filled with the kitchen waste. The upper temperature controller is inserted into the center of reaction tank. The leachate exporting tube is mounted at the bottom of the reaction tank.    USE - The device is useful for two-stage aerobic composting of kitchen waste. The composting product of this method is useful in agriculture.    ADVANTAGE - The method reduces the composting period by 5 days, improves the organic degradation rate by 15 percent and improves ammonia nitrogen fixed rate of the composting product by 40% percent; and ensures the recycling of the kitchen waste.    DETAILED DESCRIPTION - Device comprises a reaction tank (1), kitchen waste (2), an upper temperature controller (3), a lower temperature controller (4), a leachate exporting tube (5), a condenser, an oxygen detector, an ammonia capturing trap, an air flow meter, an air compression pump, an air guide tube, a reaction tank cover, a waste air conduit and an air distribution plate. The reaction tank is internally filled with the kitchen waste. The upper temperature controller is inserted into the center of reaction tank and the lower temperature controller is inserted into the bottom of the air distribution plate. The leachate exporting tube is mounted at the bottom of the reaction tank. The waste air conduit from the reaction tank cover is inserted into the ammonia capturing trap through a valve. A conduit extends from the upper part of the ammonia capturing trap is inserted into the oxygen detector. The condenser is sleeved on the periphery of the oxygen detector conduit. The air flow meter is connected to the air guide tube at the bottom of the reaction tank and the air compression pump is connected to the air flow meter. An INDEPENDENT CLAIM is also included for two-stage aerobic composting of kitchen waste, comprising (i) placing the kitchen waste into the reaction tank and adding dipotassium hydrogen phosphate and magnesium sulfate compound salt; (ii) mounting the reaction tank cover, ventilating from the bottom of the reaction tank, opening the waste air conduit and the leachate exporting tube, preventing the accumulation of the leachate and initiating the composting reaction; (iii) after initiating the reaction performing sampling for once in every 6 hours and sampling for four times in each day by maintaing equal sampling time, and sampling continuously for two days, where the heat generated during the reaction course increases the temperature to 60 degrees C; and (iv) again adding dipotassium hydrogen phosphate and magnesium sulfate compound salt, and maintaining the temperature at 60-70 degrees C.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the device for two-stage aerobic composting of kitchen waste.    Reaction tank (1)    Kitchen waste (2)    Upper temperature controller (3)    Lower temperature controller (4)    Leachate exporting tube (5)