Core drilling and sampling device for pile foundation detection

The utility model provides a core drilling and sampling device for pile foundation detection. The core drilling and sampling device comprises a mounting frame; the supporting rollers are arranged at the bottom of the mounting frame; the fixing component is used for fixing the mounting frame; the fixing component comprises locking rods arranged on the periphery of the mounting frame in an array mode. The lock rod is elastically mounted on a mounting seat on the mounting frame in a sliding manner; a locking mechanism used for locking the position of the lock rod is further arranged between the installation base and the lock rod. The locking mechanism is used for locking the position of the lock rod when the lock rod is inserted into the ground; the sampling component is arranged on the mounting frame, the sampling component comprises a driving motor capable of ascending and descending and a sampling drill rod arranged on the driving motor, and a protection mechanism used for disconnecting transmission between t