The utility model discloses a multi-level composite spiral type micro / nano-
fiber artificial
ligament which is formed by twisting micron-level or nano-level fibers made of biodegradable materials into
fiber bundles in a multi-level mode, and the adjacent twisting levels are twisted in the opposite direction. A plurality of micron and nano channels which are composed of
fiber bundles and have the physical induction characteristic are formed on the surface of the artificial
ligament, the
diameter of a single micro-nano
fiber bundle ranges from 350 nm to 52 microns, and the
diameter of the artificial
ligament ranges from 1 mm to 5.5 mm. The
diameter of the artificial ligament can be flexibly adjusted and controlled, diversified design of the
ligament structure is achieved, and various ligament requirements are met. The
mechanical property of the graft is similar to that of a human ligament, the graft can provide the function of a normal ligament and meet the requirement of normal physiological activities of people, the graft is good in
biocompatibility, regenerated new ligaments are allowed to grow in after the graft is implanted into the
human body, the graft is degradable, degradation products of the graft are harmless to the
human body and can be discharged out of the body, and the effects of replacing damaged ligaments and promoting tissue regeneration and reconstruction can be achieved.