Dredging and anti-blocking mechanism and drainage plate for vacuum preloading soft foundation treatment

The utility model discloses a desilting and anti-blocking mechanism and a drain board for vacuum preloading soft foundation treatment, which comprise a main body assembly, a filter plate and a bracket, the desilting and anti-blocking assembly comprises a desilting piece and a silt collecting piece; and the drainage assembly comprises a drainage plate and a drainage hole group. The sludge filtering device has the beneficial effects that sludge permeating from the top end of the filtering plate can be conveniently scraped into the collecting groove formed in one side through the scraping plate, so that the normal use of the device is prevented from being influenced by sludge blockage; after the fixed height position of the scraping plate is lifted, the scraping plate can adaptively remove the sludge and uniformize the surrounding sludge through autorotation, the space in the collecting box is fully utilized, and meanwhile, other parts in the collecting box are prevented from being contaminated and covered by th