Pile foundation detection device

The utility model relates to the technical field of pile foundation detection, in particular to a pile foundation detection device which comprises a base, an object placing table and a portal frame are fixedly arranged on the base, an object placing hole is downwards formed in the middle of the object placing table, a first hydraulic cylinder is fixedly arranged at the top of the portal frame, and a group of second hydraulic cylinders are symmetrically arranged on the inner walls of the two sides of the portal frame. The fixing block is fixedly arranged on the bottom face of the portal frame, the screw rod is rotationally connected with the fixing block and the portal frame, the sliding block and the screw rod form a thread pair, the bottom of the sliding block is fixedly connected with the protective cover, the observation window is fixedly connected with the protective cover, and a second sliding groove matched with the observation window is formed in the top of the storage table. The number of the protecti