Anti-clogging backwashing device for drainage and pressure relief of basement bottom plate

The utility model relates to the technical field of basement drainage and pressure relief, in particular to an anti-clogging backwashing device for drainage and pressure relief of a basement bottom plate, which comprises a ground, and a first drainage well, a second drainage well, a third drainage well and a fourth drainage well are fixedly mounted at the lower end of the ground. And the heights of the bottom surfaces of the first drainage well, the second drainage well, the third drainage well and the fourth drainage well are sequentially decreased. Two groups of water pumps are fixedly mounted in the first drainage well, so that water at the bottom of the first drainage well can be pumped by the water pumps through the drainage pipe and then pumped into the upper water pipe, and sludge in drainage holes among the first drainage well, the second drainage well, the third drainage well and the fourth drainage well is flushed through the three groups of U-shaped pipes; and the situation that the water flow cann