Closed circulating cooling device

The utility model discloses a closed circulation cooling device which comprises a water storage mechanism, a heat exchange mechanism, a cold water taking flow path, an industrial water flow path, a make-up water flow path and an overflow sewage discharge flow path, and the heat exchange mechanism comprises a first plate heat exchanger and a second plate heat exchanger. Water in the water tank is driven by the circulating pump to flow through the plate-type heat exchanger, external equipment needing to be cooled and some valve paths respectively, when the water flows through the plate-type heat exchanger, the water exchanges energy with external industrial water, heat is released, the water temperature drops, and when the water in the circulating system flows through the external equipment needing to be cooled, the water in the circulating system flows through the external equipment needing to be cooled. Energy exchange with external equipment needing to be cooled is achieved, heat can be absorbed, and the tem