The invention relates to a building formwork with a repair function and belongs to the technical scope of green construction. The building formwork comprises a formwork body, a through hole is formed in the formwork body, two kinds of repair plugs used with the formwork body cooperatively are arranged in the through hole and are a plugging peg and a repair block respectively, the outer contour of each repair plug fits the shape of the through hole, the surface of the outer side of each repair plug is fixedly connected with the inner wall of the through hole, and the thickness of each repair plug is equal to that of the formwork body. The vertical-axis section of the through hole is T-shaped or H-shaped, the vertical-axis section of the plugging peg is also T-shaped or H-shaped, and a bolt hole is formed in the middle of the repair block. Gaps between the repair plugs and the formwork body are connected through adhesive. A punched hole of the formwork body is repaired in various modes by using the repair plugs, and building side formworks and top formworks of walls and columns in the process of building construction can be quickly transformed for common use, so that use efficiency of the building formwork is improved, consumption and waste of the building formwork are reduced, building cost can be saved greatly, and use efficiency of resources is improved.