A bendable, telescopic, and flexible mechanical structure comprises: a distal-end structure body, a proximal-end structure body, and a middle connecting body. The distal-end structure body comprises a distal-end spacing disc, a distal-end locking disc and a structure bone. The proximal-end structure body comprises a proximal-end spacing disc, a proximal-end locking disc and the structure bone. The middle connecting body comprises pipe fixing plates and a pipe. The distal-end structure body is connected to the proximal-end structure body through the middle connecting body. One end of the structure bone is fixed on the proximal-end locking disc. Then, the structure bone passes through the proximal-end spacing disc, the middle connecting body and the distal-end spacing disc sequentially, and is fixed on the distal-end locking disc.