The utility model discloses a circulated cleaning water tank, which comprises a support frame and an annular water tank body, wherein electric motors are correspondingly arranged at both sides of the annular water tank body, and a roller and a ball valve are arranged on the support frame through a bearing and a bearing seat correspondingly to the electric motors, wherein the electric motors and the roller are connected through a belt and a belt pulley, and the bottom of the annular water tank body is provided with a funnel-shaped water discharge opening. The utility model has the advantages of practicability, convenience, cleaner material cleaning and clearer pollution discharge, and further improves the work efficiency.