Road drainage filtering device

The invention relates to the technical field of highway drainage facilities, in particular to a highway drainage filtering device which comprises a main body assembly, a placement plate, a baffle arranged at the end of the placement plate, a collection box arranged at the end of the placement plate and a fixing plate arranged at the end of the collection box. The filtering assembly comprises a drainage pipe, a cover plate arranged at the end part of the drainage pipe, a dredging plate arranged at the end part of the drainage pipe, and a hinge rod and a connecting rod which are arranged in the drainage pipe; the collection boxes are arranged on the two sides of the drainage pipe, small impurities which cannot be blocked by the placement plate enter the collection boxes, even if the collection boxes are completely blocked by the impurities, accumulated water can also enter the drainage pipe from the collection boxes, the situation that drainage cannot be conducted due to blockage is avoided, and when the extern