The embodiment of the invention discloses an intake air filtering screen device of an air-conditioning outdoor machine and a cleaning method thereof, and relates to the technical field of air conditioners, and the intake air filtering screen can be cleaned automatically and can be maintained by users, therefore the time-saving and labor-saving effects are achieved. The intake air filtering screen device of the air-conditioning outdoor machine comprises an intake air filtering screen and a cleaning device which is arranged at one side of the intake air filtering screen and is used for cleaning the intake air filtering screen. The cleaning method of the intake air filtering screen device of the air-conditioning outdoor machine comprises the following steps of: acquiring the temperature of a refrigerant evaporator coil and the air outlet temperature at the air outlet of the air-conditioning outdoor machine; and controlling the intake air filtering screen device to clean the intake air filtering screen if the temperature of the refrigerant evaporator coil is lower than a preset first temperature threshold value, and the air outlet temperature is lower than or equal to a preset second temperature threshold value.