Pile foundation pulling resistance detection device

The utility model discloses a pile foundation anti-pulling detection device which comprises a supporting frame, two transverse rods are fixedly connected to the supporting frame, a sliding rail is fixedly installed on the transverse rods, a sliding plate is connected to the sliding rail in a sliding mode, a tension air cylinder is fixedly installed on the sliding plate, the output end of the tension air cylinder is connected with one end of a telescopic rod in a matched mode, and the output end of the tension air cylinder is connected with the other end of the telescopic rod in a matched mode. The other end of the telescopic rod is connected with a fixing plate in a matched mode, four sets of clamping mechanisms are arranged on the two sides of the fixing plate, the four sets of clamping mechanisms are the same in structure and comprise L-shaped connecting strips, clamping air cylinders are fixedly installed on the L-shaped connecting strips, the output ends of the clamping air cylinders are connected with on