本发明公开了一种血管支架用可降解镁合金毛细管材的制备方法；所述镁合金毛细管材的制备方法主要包括挤压和拉拔两道工序。制备方法包括如下步骤：步骤1、利用生物可降解镁合金机加工镁合金管材热挤压坯料；步骤2、采用步骤1中所述镁合金管材热挤压坯料经过热挤压获得无缝镁合金毛细坯管，挤压时对挤压出来的毛细管坯进行快速冷却处理从而控制管材的晶粒尺寸；步骤3、将步骤2得到毛细坯管经过拉拔得到血管支架用镁合金毛细管材。本发明制备方法工艺简单、加工成本低，且镁合金管材的表面质量好、综合力学性能优良、几何尺寸精度高；加工出的镁合金细径薄壁管材外径尺寸为Φ1~Φ4mm，壁厚0.1~0.2mm，单根长度≥1000mm。

he invention discloses a preparation method of degradable magnesium alloy capillary material for vascular scaffold; The preparation method of magnesium alloy capillary material mainly includes extrusion and drawing two processes. The preparation method includes the following steps: Step 1. Magnesium alloy tube hot extrusion billet is processed by biodegradable magnesium alloy machine; Step 2. Seamless magnesium alloy capillary tube is obtained by hot extrusion of the magnesium alloy tube blank described in Step 1. During extrusion, the extruded capillary tube blank is rapidly cooled so as to control the grain size of the tube. Step 3. Magnesium alloy capillary material for vascular stent was obtained by drawing the capillary tube obtained in Step 2. The preparation method has the advantages of simple process, low processing cost, good surface quality, excellent comprehensive mechanical properties and high geometric dimension accuracy of magnesium alloy pipe. The outer diameter size of the magnesium alloy thin wall pipe is φ 1~ φ 4mm, the wall thickness is 0.1~0.2mm, and the single length is ≥1000mm.