Toughness measuring device for concrete combination surface

The utility model relates to a toughness measuring device for a concrete combination surface. The toughness measuring device comprises a coaming plate, a cover plate, adsorption type magnets and handles, the coaming plate is a closed-loop plate body with an upper opening and a lower opening, the cover plate is horizontally arranged in the coaming plate and is tightly connected to an inner wall of the coaming plate, the adsorption type magnets are arranged on the cover plate, the handles are arranged on the cover plate, the cover plate is provided with holes for adding small iron beads towards the lower side of the cover plate, the holes are uniformly arranged on the surface of the cover plate in a grid manner or in a quincuncial pile manner, the number of the absorption-type magnets is at least one, the requirement that every corner of the cover plate is needed to be covered by the absorption force of the adsorption type magnets is met via the number of the adsorption type magnets, and the lower surface of th