Anti-blocking device for drainage and pressure reduction drainage port

The anti-blocking device comprises a mud blocking component hinged in a drainage ditch through a connecting piece, the length of the mud blocking component is larger than the width of the drainage ditch, an elastic piece is arranged on the mud blocking component, and the opening direction of the mud blocking component is the same as the water flow direction. One end of the mud blocking component is hinged to a side plate of the drainage ditch through a connecting piece, and the other end of the mud blocking component is in lap joint with the drainage ditch. According to the utility model, sludge and sundries are effectively prevented from obstructing the drainage pressure-reducing drainage port, smooth drainage of the drainage pressure-reducing drainage port is ensured, the blockage problem of the drainage pressure-reducing drainage port is reduced, and the drainage pressure-reducing drainage port is simple and convenient to use, can be disassembled and assembled, is convenient to turnover, and can solve many