Anti-blocking floor drain for drainage

The utility model discloses an anti-blocking floor drain for drainage, which comprises an outer sleeve shell, a water flowing channel is arranged in the outer sleeve shell, and the outer end of the upper side of a filter assembly is connected with a limiting mounting block; the limiting mounting rod is connected to the upper side of the interior of the filtering assembly, a threaded connecting rod is mounted on the upper side of the interior of the limiting mounting rod, a connecting groove is formed in the outer side of the interior of the limiting mounting rod, and a buoyancy block is mounted on the outer side of the limiting mounting rod; and the limiting sliding block is connected to the inner end of the buoyancy block and located in the connecting groove, the outer end of the buoyancy block is connected with a filtering plate, a filtering through groove is formed in the filtering plate, and a stacking groove is formed in the upper side of the filtering plate and located in the outer sleeve shell. Accordi