The invention provides a control method of an air conditioner and the air conditioner. After a refrigeration mode of the air conditioner is opened, the exhaust end pressure and the exhaust end superheat degree of a compressor of the air conditioner are detected in real time; and when numerical values of the exhaust end pressure and the exhaust end superheat degree meet preset conditions, a throttling device of the air conditioner is closed to improve the exhaust end superheat degree of the compressor. When detecting results show that the numerical values of the exhaust end pressure and the exhaust end superheat degree both meet a pressure range and a superheat degree under the preset conditions, the throttling device of the air conditioner is controlled to be closed, so that a refrigerantcannot temporarily circulate in the throttling device; and the compressor can be normally operated to extract away low-pressure refrigerant between the throttling device and the compressor, so that atemperature value of an exhaust end of the compressor is increased, the exhaust end superheat degree of the compressor can be increased, the total evaporation of the refrigerant in an evaporator can be guaranteed, the hydraulic shock phenomenon of the compressor is effectively prevented, and the service life of the compressor is guaranteed.