S wave cooling tower fills has trapezoidal "s" wave design, which increases the closure number of water film, and makes the water film redistribute repeatedly as well as tending to be more uniform. It extends the time for heat and mass transfer and improves the cooling effect. Several pieces of fills are connected with each other, forming honeycomb passages, which prevents contaminants from blocking. It is widely used for counter-flow cooling tower in industrial area and cement cooling tower with hyperbolic curve in power plant.