The invention relates to a humidifying and purifying module and a manufacturing method thereof. The humidifying and purifying module is a major component of a system for air humidification, air purification and evaporation cooling, belonging to the technical field of devices for humidification, air purification and cooling. The humidifying and purifying module is prepared from the following components in percentage by weight: 20-80% of volcanic particles, 15-40% of cement, 0.1-10% of negative ion powder, 0.1-2% of antibacterial powder and 5-30% of coarse fly ash. The manufacturing method comprises the following steps of: adding water accounting for 5-35% of total weight of the materials, fully stirring, sending the stirred raw materials to a casting box, fully vibrating and compacting for molding, taking out a molded product, and curing the product to form the humidifying and purifying module. The humidifying and purifying module provided by the invention has strong water absorption power and can filter out floating particles in the air. By adding a functional material into the humidifying and purifying module, a great quantity of negative ions can be generated in the air, and harmful substances such as formaldehyde, benzene and the like in the air can be decomposed. The humidifying and purifying module resists bacteria and mildew and removes odor, so that the efficacies of water absorption, humidification, cooling, harmful gas elimination and air purification are achieved.