The invention discloses a modular dehumidification air cooler, and relates to the technical field of low-temperature refrigeration equipment. The dehumidification air cooler includes a machine body, an air inlet, an air outlet, a cold air assembly and a water spraying assembly, wherein the air inlet and the air outlet are formed in the machine body, and the cold air assembly and the water sprayingassembly are arranged in the machine body. The machine body includes an air inlet area and an air outlet area which communicate with each other through a bent air pipe. A drying assembly is arrangedbetween the cold air assembly and the water spraying assembly and comprises a plurality of layers of sample separation screening nets located between the water spraying assembly and the air outlet. The mesh diameters of the sample separation screening nets are reduced from the drying assembly to the air outlet in sequence. The bent air pipe is provided with a cold water pipeline for allowing coldwater to flow through in a coiled mode. The modular dehumidification air cooler can remove most moisture from cold air before exhausting the cool air, air dryness in the surrounding environment is maintained, and the influence on the moisture content of air in a factory is reduced.