The is the mixed-flow closed cooling tower, that has a large air chamber, so it can choose a large volume fan, and large area air inlets at the front and side of the tower, ensuring the high speed air flow and heat exchange rate. The temperature of spray water can be controlled below the level that is easy to scale, and the same direction of wind and water prevents the scaling of coil pipe to a large extent. The huge internal space can be accessed into the tower through the access door, providing convenience for the routine inspection, maintenance and troubleshooting of the equipment. It is applicable to cooling projects with unlimited site, high temperature, large temperature difference (t=6-200C) or large cooling capacity, such as high-power project cooling.