Cerebral nerve endoscope sheath fixing device

The invention provides a cranial nerve endoscope sheath fixing device. The cranial nerve endoscope sheath fixing device comprises a hollow columnar main body, wherein a fixing protrusion (11) protruding outwards is arranged on the outer circumferential surface of the main body (1), one end of the main body (1) is provided with a frustum expansion device (23) or a clamping slot locking device (2),the other end of the main body (1) is provided with a clamping device (3), the clamping device (3) comprises a clamping claw (33) and an anti-loosening tightening nut (31) for pressing the clamping claw, the main body corresponding to the clamping device (3) is provided with an external thread, and the anti-loosening tightening nut (31) is matched with the corresponding external thread (12) of themain body. According to the cranial nerve endoscope sheath fixing device, through the joint action of the upper and lower ends of the main body, a sheath tube is fixed to a skull hole; the cranial nerve endoscope sheath fixin