Concrete pouring wellhead protection device

The utility model relates to the technical field of road well mouth construction, in particular to a concrete pouring well mouth protection device which comprises two symmetrically-arranged formworks and a supporting piece, the two formworks comprise an inner framework and an outer lining plate which are connected with each other, and the outer lining plate is arranged around the periphery of the inner framework; the two outer lining plates are both semicircular, the inner framework comprises an upper-layer framework, a lower-layer framework and supporting rods, and the upper-layer framework and the lower-layer framework are fixed through the supporting rods. A first limiting piece is arranged on one of the templates; a first limiting piece is arranged on one template, a second limiting piece is arranged on the other template, and the first limiting piece and the second limiting piece are detachably connected and can fix the supporting piece. The spliced formwork is adopted, formwork removal is facilitated, m