Commercial concrete anti-cracking performance testing device

The utility model discloses a commercial concrete anti-cracking performance testing device which comprises a bottom plate, vertical plates are symmetrically arranged on the two sides of the top of the bottom plate, a transverse plate is arranged on the tops of the vertical plates, a hydraulic cylinder is arranged in the middle of the bottom of the transverse plate, and the output end of the bottom of the hydraulic cylinder is connected with a pressing plate. The opposite sides of the two vertical plates are connected with sleeves through bearings, the inner walls of the ends, opposite to the vertical plates, of the sleeves are in threaded connection with screws, the ends, opposite to the sleeves, of the screws are connected with strip-shaped plates, and limiting plates are symmetrically arranged on the front sides and the rear sides of the strip-shaped plates. The concrete slab is placed between the two strip-shaped plates, the sleeve is rotated, and the two strip-shaped plates clamp and fix the concrete slab