The invention relates to an air dehumidifying and cooling device, which is characterized by comprising a box with an upper space and a lower space separated by a baffle plate. The lower space is provided with a plurality of levels of dehumidifying modules. A plurality of heat pipes with fins are respectively arranged between each level of dehumidifying modules. The upper parts of the heat pipes respectively pass through the baffle plate hermetically and extend into the upper space. A coolant is arranged in the upper space. A coolant circulation loop is formed by the coolant, a pipeline, a liquid pump and a liquid storage tank. The heat pipes are arranged among all dehumidifying modules and cooled through the cooling device in the upper space, and directly reduce the temperature of the airentering next level dehumidifying modules, so the dehumidifying effect of the overall equipment is effectively improved. The air dehumidifying and cooling device has a simple structure, easy manufacture, strong practicability, easy popularization, and can be widely used in occasions requiring air dehumidifying and cooling.