Lumbar cistern drainage puncture needle capable of establishing subcutaneous tunnel

A lumbar cistern drainage puncture needle capable of building a subcutaneous tunnel comprises a lumbar cistern drainage tube and a puncture needle, the two ends of the lumbar cistern drainage tube are the inner end and the outer end respectively, and the interior of the lumbar cistern drainage tube is a drainage cavity for leading out cerebrospinal fluid and/or hydrocephalus. The puncture needle is characterized in that one end of the puncture needle is a puncture tip, a connecting rod is fixed to the other end of the puncture needle and used for being inserted into a drainage cavity of a lumbar cistern drainage tube, the outer diameter of the connecting rod is larger than the inner diameter of the lumbar cistern drainage tube, and a thin film outer cover for wrapping the joint of the connecting rod and the lumbar cistern drainage tube is fixed on the puncture needle at one end where the connecting rod is located. According to the lumbar cistern drainage puncture needle, the lumbar cistern drainage tube is fi