The invention discloses a kitchen garbage leachate treatment process, which comprises the steps of (1) switching on air-blasting equipment, keeping at a continuous ventilation state, and emptying blocked holes; (2) paving a layer of conditioning agent in a compost slot; (3) obtaining a mixed material; (4) piling into a strip pile; (5) paving a leachate back-spray pipeline on the surface of the piled strip pile; (6) covering an anti-smelly gas-permeable membrane; (7) starting primary aerobic fermentation, collecting a leachate, and back spraying the leachate after 10 to 14 days of primary aerobic fermentation; (8) after 25 to 30 days of primary aerobic fermentation, transferring fermented residues to another slot of the compost slot, repeating the step (4) and the step (6), starting secondary aerobic fermentation, and after 7 to 20 days, accomplishing the process. According to the kitchen garbage leachate treatment process provided by the invention, the pile is built in the sealed compost slot, and during boiling fermentation, the leachate is collected and back-sprayed through a way of injecting into the leachate back-spray pipeline through a water pump so as to be completely absorbed and completely decomposed through aerobic fermentation, so that the generation of bad smell is thoroughly reduced, and the pollution on the environment caused by bad smell volatilization is eliminated.