Anti-blocking water suction pump

The invention discloses an anti-blocking water suction pump, and belongs to the technical field of pumps, the anti-blocking water suction pump comprises a pump shell, a machine shell is arranged at the upper end of the pump shell, an impeller is arranged in the pump shell, and one end of a rotating shaft is arranged at the upper end of the impeller. The sponge layer of the first filter screen is used for deep filtration, impurities in sewage can be basically discharged after double filtration, the filtering effect is good, the impurities in the sewage are prevented from entering the pump body, and the good anti-blocking effect is achieved; when a filter screen is cleaned, a flushing pump runs, pumped water enters a pump shell through a flushing pipeline for back flushing, meanwhile, a motor of the flushing pump drives a rotating impeller, a second belt wheel, a belt, a first belt wheel and a second rotating rod to rotate and link, and finally, a second filter screen is driven to rotate and turn over; therefor