Wastewater storage device

The utility model relates to a waste water storage device which comprises a storage barrel and a water level assembly arranged on one side of the top of the storage barrel, a driving assembly is arranged on the top of the storage barrel, and the bottom of the driving assembly penetrates through the top of the inner wall of the storage barrel and is provided with a cleaning assembly. A water retaining strip plays a role in relieving the impact of water flow, the continuously rising water level pushes a buoyancy ball to rise, the buoyancy ball extrudes a swing rod to swing to drive a gear to rotate, the gear pushes a toothed plate to slide on the surface of a sliding rod, and therefore an indicating plate on the top is driven to move, observation is conducted according to scales, and a motor is started to drive a rotating rod to rotate; and a rotating rod drives a connecting disc at the bottom to rotate, so that cleaning scraping plates on the two sides are driven to clean the bottom of the inner wall of the st