Puncturing needle assembly

The utility model relates to a puncturing needle assembly which comprises a puncturing needle, a guide wire, a sheath catheter with an expander. The puncturing needle assembly further comprises a three-dimensional positioning and orienting device. The guide wire is arranged in the puncturing needle to form an integrated guide-wire-shaped solid core puncturing needle. The guide-wire-shaped solid core puncturing needle is connected with the sheath catheter with the expander and the three-dimensional positioning and orienting device. By means of the puncturing needle assembly, the puncturing needle assembly can be used for finishing the interventricular septum paracentesis and the interatrial septum paracentesis through the venipuncturing path; the problems existing in the prior art effectively are solved; the purpose of selecting the blood vessel access passage surrounding the portion to be operated without limits can be achieved; the space position selection of the puncturing target point and the advancing direction of the puncturing needle point can be limited effectively and positioned precisely and objectively; the puncturing needle can puncture the spetum the two-step operation and one-step finish mode between the puncturing needle and a guide wire path is built; the puncturing needle assembly is safe and easy and convenient to operate; the operating technique difficulty is lowered greatly, the operating technique error risks can be avoided completely, and the risks of ventricular free wall perforation, pericardial tamponade and the like can be fully avoided.