The invention relates to an air conditioner self-cleaning control method. The air conditioner comprises a refrigerant circulation loop composed of a compressor, a four-way valve, an outdoor heat exchanger, a throttling component, a stop valve, an indoor heat exchanger and a gas-liquid separator, wherein temperature sensors are respectively arranged on the compressor, the outdoor heat exchanger andthe indoor heat exchanger. The control method comprises a preheating process, a frosting process, a drying process I, a drying process II and a drying process III. According to the air conditioner self-cleaning control method, the cleaning effect of the air conditioner heat exchanger can be effectively enhanced, high-temperature sterilization can be achieved, and the heat exchanger can be kept dry; and in addition, the liquid return amount of the system can be controlled by controlling the exhaust superheat degree, the dilution of the liquid refrigerant to the oil is reduced, and the servicelife of the compressor is prolonged.