Hardness detection device for metal casting

The utility model discloses a hardness detection device for a metal casting, which relates to the technical field of hardness detection and comprises a hardness detection frame, the top end of one side and the bottom end of one side of the hardness detection frame are fixedly connected with a detection top tray and a detection bottom tray, and the surface of the detection top tray is provided with a sliding limiting groove. The top end of the sliding limiting groove is slidably connected with a sliding controller. The two ends of the metal casting needing to be detected are clamped through the fixers, hardness detection is conducted on the two faces of the metal casting through the hardness detectors on the detection top disc and the detection bottom disc at the same time, detection data are directly displayed on the detection data displayer, and the comprehensiveness of the detection position can be improved; the detection accuracy can be improved by utilizing the data comparison effect, and two-sided detect