Transpedicular vertebral fusion surgical instrument

The invention discloses a tanspedicular vertebral fusion surgical instrument. The instrument comprises a puncture needle assembly, a protective sleeve assembly, a conveying pipe assembly and a sheathcore assembly. According to the tanspedicular vertebral fusion surgical instrument, a surgical channel is established to be percutaneous and tanspedicular to enter a vertebra, single-side or double-side puncturing is conducted, a diameter of the channel is 3-5 mm, surgical wounds are effectively reduced, and complications are reduced. Meanwhile, the tanspedicular vertebral fusion surgical instrument is provided with a conveying pipe and a sheath core, far-end bent sections of the conveying pipe and the sheath core are both flexible sections made of shape memory alloies, the head end can guarantee enough pushing force in a cavity opening process without deformation or breakage, a handle is matched with a sliding block to control release and recovery of the conveying pipe (a cavity opening catheter), larger propelli