Forced drainage type water tank

The utility model discloses a forced drainage type water tank, particularly relates to the technical field of drainage equipment, and aims to solve the problems that a traditional water tank runs downwards, on-site ground construction is tedious, the water tank is easy to block and troublesome to overhaul, and the traditional water tank is unstable in operation, more in fault, high in maintenance cost, short in consumable service life and high in consumable cost. A filter screen is arranged on the box body, a cleaning assembly is arranged in the box body, the cleaning assembly comprises a worm, and the worm rotationally penetrates through one side wall of the box body and one side wall of the water storage tank and is rotationally connected between the interior of the water storage tank; the nut block drives the scraper to move, fines at the bottom of the filter screen are cleaned, the situation that the fines block the filter screen, and consequently water flows into the water storage tank is prevented, the