Road drainage device for sponge city

A road drainage device for a sponge city comprises a drainage pipeline, a butt joint pipeline, a circular collecting groove, a strip-shaped water passing groove, a drainage cover plate and a circular filter plate, the drainage pipeline is pre-buried underground, drainage pipeline upper water inlets are formed in the upper portion of the drainage pipeline, and the multiple drainage pipeline upper water inlets are evenly distributed in the drainage pipeline; the lower portion of the butt joint pipeline is matched with an upper water inlet of the drainage pipeline, the lower portion of the butt joint pipeline penetrates through the upper water inlet of the drainage pipeline, the butt joint pipeline is inserted into the drainage pipeline, a butt joint pipeline protruding ring is arranged on the outer side of the butt joint pipeline, and the lower surface of the butt joint pipeline protruding ring is attached to the drainage pipeline. The lower pipe of the circular collecting groove is matched with the butt-joint