PURPOSE: A fish farm water sterilizing device is provided to sterilize water using a ultraviolet sterilization unit and to supply sterilized water to a fish farm. CONSTITUTION: A fish farm water sterilizing device comprises a branch tank(10), a water inlet tube(20), a branch inlet tube(30), an ultraviolet sterilization unit(40), a connection pipe(50), a first valve(510), and a second valve(530). The branch tank discharges water to a fish farm. The water inlet tube flows water in an inlet. The branch inlet tube is connected to the water inlet tube. The ultraviolet sterilization unit sterilizes water flown in the branch inlet tube using ultraviolet rays. The connection pipe flows sterilized water in the branch tank.본 발명은 양어장 용수 살균장치에 관한 것으로서, 자외선살균부를 통해 용수에 포함된 미생물 등을 포함한 이물질을 보다 용이하게 살균처리하여 양어장으로 살균처리된 용수를 순환공급할 수 있는 효과가 있다.
