Circulating water system for shield tunneling machine

The utility model discloses a circulating water system for a shield tunneling machine. The utility model relates to the technical field of shield tunneling machines. Outer box, a cooling water tower is mounted in the outer box body; a water turbine is mounted at the top of the cooling water tower; a water inlet pipe is mounted on one side of the water turbine; a guide pipe is mounted at the bottomof the water turbine; fan blades are mounted at the top of the water turbine; a spray head is mounted at one end of the guide pipe; a water spraying filler is mounted at a position, close to the lower part of the spray head, in the cooling water tower; a water adding tank is mounted at the bottom in the outer box body; a water pipe is mounted on one side of the water adding tank; the water turbine is driven to work through water flow, a large amount of electric power does not need to be provided for the circulating water system for water cooling, the electric quantity is saved, the working efficiency of water cooling