The utility model discloses a direct evaporative cooling air conditioning unit capable of realizing automatic intermittent water supply. The direct evaporative cooling air conditioning unit capable of realizing automatic intermittent water supply comprises a unit shell, wherein a fresh air inlet and an air supply outlet are formed in the two opposite side walls of the unit shell respectively; a disk filter, a direct evaporative cooler, a water fender and a blower are arranged in sequence in the fresh air inlet direction inside the unit shell; the lower end of the water fender is arranged in a water collection tank a of the direct evaporative cooler; a water collection tank b is arranged on the top of the unit shell and connected with a dripping and spraying device of the direct evaporative cooler through a siphon. According to the direct evaporative cooling air conditioning unit capable of realizing automatic intermittent water supply, the siphonage is used for realizing automatic intermittent water supply, energy consumption of the air conditioning unit is further reduced, the leading function of evaporative cooling is given full play to, and therefore the air conditioning unit has the advantages of environmental friendliness, high efficiency and energy conservation.