Bending device of insertion portion of endoscope

The utility model discloses a bending device of an insertion portion of an endoscope. The device comprises a snake-bone-shaped connector, a tube head and a probe, wherein the tube head is arranged at one end of the snake-bone-shaped connector, and the probe is arranged at the other end of the snake-bone-shaped connector. An adjusting rope connected with the probe is arranged in the snake-bone-shaped connector. The snake-bone-shaped connector is composed of snake bones, wherein two snake bones are arranged as a group, and the multiple groups of the snake bones are connected into a strip shape. Each snake bone is composed of snake bone bodies connected in an end-to-end mode through rotating shafts. The probe comprises a camera lens protective cover, a sampling tube, a spraying tube, a camera lens seat and a camera lens, wherein the camera lens protective cover is connected with the snake-bone-shaped connector, the sampling tube extending into the snake-bone-shaped connector is arranged on the camera lens protective cover, and the spraying tube is arranged on the camera lens protective cover, the camera lens seat is arranged on the camera lens protective cover, and the camera lens is arranged on the camera lens seat. The bending device of the insertion portion of the endoscope has the advantages of being flexible to operate and accurate in observation angle.