Standardized profile steel over-welding hole marking tool

The invention belongs to the technical field of ocean engineering construction and installation, and particularly relates to a standardized profile steel over-welding hole marking tool which comprises a standardized over-welding hole marking tool body, wherein a first over-welding hole is formed in the edge surface of the standardized over-welding hole marking tool body, a handheld end is arranged on the outer side of the standardized over-welding hole marking tool body, a round hole is formed in the surface of the standardized over-welding hole marking tool body, a web plate is arranged on the back face of the standardized over-welding hole marking tool body, a second over-welding hole is formed in the surface of the edge of the web plate, an upper flange is arranged at the upper end of the web plate, and a lower flange is arranged at the lower end of the web plate. By arranging the standardized over-welding hole marking tool body, the first over-welding hole, the handheld end and the round hole, the standar