Combined Dry-Wet Closed Circuit Cooling Tower, the cooling tower is divided into two parts structurally: the upper part is a finned air cooler, and the lower part is a counter-current closed circuit cooling tower heat exchanger. The upper air cooler can meet the cooling process requirements in winter. In summer, a wet heat exchanger is used to utilize the latent heat of vaporization to reduce the temperature of the heat medium, which not only reduces the initial investment but also maximizes water resource conservation.