Water circulation device

The utility model relates to the technical field of sewage treatment, and discloses a water circulation device. Comprising a water storage tank, the top of the water storage tank is communicated with a water inlet pipe, the bottom of the water storage tank is communicated with a water passing pipe, the inner top wall of the water storage tank is fixedly connected with a fixing block, and the bottom of the fixing block is fixedly connected with a drainage shell. A series of electric appliances such as a water pump are used during water circulation treatment, although the situation of water resource waste is optimized and the electricity utilization cost is increased, a generator is arranged at a water outlet of a settling tank, and when the water level in a water storage tank exceeds the height of a water passing pipe, air pressure is given, so that water in the water storage tank is discharged to the settling tank through the water passing pipe; when water passes through the reducing pipe, the pipeline space