The utility model discloses an air conditioning outdoor unit spraying cooling system which comprises a spray head and further comprises a pressure sensor, a temperature sensor and an automatic control device, wherein the spray head is connected with a water source and used for spraying water mist to an air conditioning condenser. The automatic control device controls the spray head to spray water mist. An output end of the pressure sensor and an output end of the temperature sensor are both connected with the automatic control device. A high-pressure pump which is used for adjusting water pressure is arranged between a water purifier and the spray head and controlled by the automatic control device. The high-pressure pump is communicated with a plurality of branch pipes through pipelines. The branch pipes are provides with magnetic valves which are controlled by the automatic control device and used for adjusting water quantity of the spray head. The air conditioning outdoor unit spraying cooling system has the advantages of capable of automatically adjusting spray quantity based on change of pressure and temperature of the condenser, thereby improving effect of air conditioning refrigeration and saving electricity.