The utility model provides a four flow cooling water system in condenser, includes two sets of cooling water piping and condenser, and the condenser is linked together with two sets of cooling water piping, and every cooling water piping of group includes all that a cooling water inlet pipe says and a corresponding cooling water outlet pipe way, is provided with communicating pipe between the arbitrary a set of cooling water inlet pipe way and the cooling water outlet pipe of another group say to the last intercommunication dish valve that is provided with of communicating pipe, all be provided with into water butterfly valve on every cold water inlet channel in two sets of, all be provided with out the water butterfly valve on every the cooling water outlet pipe way in two sets of to thesetting of communicating pipe one end is being intake between butterfly valve and the condenser, and other end setting is between a water butterfly valve and condenser. The utility model discloses caneffectively solve because of the easy scale deposit problem of the low condenser cooling tube that causes of the cooling water velocity of flow, to configuration rubber ball cleaning system's unit, behind the improvement condenser cooling tube internal cooling water flow velocity, improve unit operational economy and security.