A kitchen waste oil-water separation apparatus comprises an air flotation tank, a suction fan, a bubble releaser, an air dissolving system, and a scumming device. The air flotation tank is of sealed box structure, comprising a reaction tank, a clear water tank and an oil collection tank. The bubble releaser releases micro bubbles evenly into the whole reaction tank. The air dissolving system comprises a reflow pump, an air dissolving tank and an air compressor; a heater is arranged in the air dissolving tank. Kitchen wastewater enters the air flotation tank after being subjected to heat exchanging and preheating; high-temperature air-dissolved water is released evenly in the reaction tank so that oil-water temperature in the reaction tank is increased evenly, lumpy solid animal oil sticking to the surface of kitchen waste is decomposed into small-molecular emulsified oil, oil in the kitchen waste is enriched to maximum extent, and recycling rate of oil from the kitchen waste is increased. The suction fan is connected with the air dissolving tank and the reaction tank, high-temperature fouling gas generated from inside of the reaction tank is blown into the air dissolving tank, the operation is circulated in sealed manner, secondary pollution is avoided, and energy consumption is lowered.