A medical hypotube is a long metal capillary tube, which is an important component of the catheter for minimally invasive treatment and needs to be used in conjunction with the balloon and stent to open the blocked artery. The balloon part of the catheter is attached to the distal end of the tube. The hypotube enters the human body and pushes the balloon along the tortuous long blood vessels to the artery blockage. In this process, it achieves anti-kinking and anti-bending and can smoothly travel, promote, track and rotate in the human body structure.