Central venous catheter tunnel needle and tunnel type central venous catheter

The utility model discloses a central venous indwelling catheter tunnel needle and tunnel type central venous catheter, including the rod part, the first end of rod part is provided with the puncture needle head, the second end of rod part is provided with the joint that is used for fixing and pulling the catheter, the rod part is provided with a plurality of sections of necking down structure at interval, the rod part includes the flexible section, and the flexible section is provided with the puncture needle head and the joint that is used for fixing and pulling the catheter. And the flexible section at least comprises a section of distance extending from the first end of the rod part to the second end of the rod part. According to the scheme, the contact area of the tunnel needle and subcutaneous tissue is reduced, frictional resistance is reduced, the catheter indwelling time is shortened, the infection risk is reduced, the comfort degree is improved, meanwhile, the tunnel needle can be suitable for diffe