The invention relates to an air-cooling module unit based on cooling airflow spraying cooling. The air-cooling module unit mainly comprises an air-cooling module unit body, a cooling airflow channel and a spraying system. The air-cooling module unit body is of a cuboid-shaped two-layer frame structure, the cooling air channel is located in front of a condenser and composed of two side plates and one top plate, and the spraying system comprises an air compressor, a softened water pump, a nozzle supporting shaft, a stepping motor, bubble atomizing nozzles, a compressed air mother tube, a softened water mother tube, a filter, a compressed air branch tube, a softened water branch tube, a water branch circuit solenoid valve, a water branch circuit check valve, an air branch circuit solenoid valve, an air branch circuit check valve and a temperature and humidity sensor. The condenser of the air-cooling unit is intensified by organizing flowing of cooling airflow and utilizing the low-energy-consumption nozzles for conducting spraying cooling on the cooling airflow. The comprehensive refrigeration performance coefficient of the air-cooling module unit is increased by 15% to 30% compared with the refrigeration performance coefficient of a conventional air-cooling module unit.