Anti-impurity rapid sewer type floor drain

The invention discloses an anti-impurity rapid sewer type floor drain, and belongs to the technical field of bathroom equipment. The floor drain comprises a chassis, a positioning hole and a pre-buried shell; a top cover hole is formed in the upper portion of the pre-buried shell, a bottom pluggable hole is formed in the lower portion, a water inlet is formed in the center of the top cover hole, acircular pipe water inlet is formed in the water inlet, a water outlet is formed in the center of the bottom pluggable hole, step holes are formed inside the water outlet and the water inlet, an upper cover is arranged between the water inlet and the top cover hole, a top cover placement hole is formed in the upper cover, the bottom of the upper cover is provided with a bottom circular pipe, a circular pipe water outlet is formed in the bottom circular pipe, each of the step holes inside the water inlet and the water outlet is internally provided with a filter assembly composed of a filter disc, a connecting rod and