hypotube is a kind of long metal tube, which has micro-engineering characteristics throughout the pipeline. It is an important component of minimally invasive catheter, which needs to be used with balloon and stent to open arterial occlusion. The balloon part of the catheter is attached to the distal end of Yu Haibo tube. The hypotube enters the human body and pushes the balloon along the long and complicated blood vessels to the artery occlusion. In this process, the hypotube needs to avoid kinking, and at the same time, it can move smoothly in the human structure (propulsion, tracking and rotation).