A bunion is a foot deformity in which the bunion is deflected outward beyond the normal physiological angle, manifesting as a flared bunion with an inflated medial projection (bony formation), and in severe cases, a thickened painful callus (callus) on the bottom of the foot, and other toes other than the bunion are also deformed one after another. Patients with bunions often have difficulty walking because of the pain and toe deformation, and are unable to walk, which brings inconvenience and pain to work and life, and also lacks aesthetic appearance. The bunion treatment is mainly surgical, and there are more than 100 surgical methods. The minimally invasive bunion treatment research led by our orthopedic group innovatively combines minimally invasive techniques with traditional techniques, and according to the multiple pathological changes of bunion, through preoperative mathematical model calculation, multi-directional and multi-angle osteotomy is adopted to comprehensively correct the deformity in three-dimensional direction, and the osteotomy end is fixed with a single Herbert nail with limited internal fixation, which reduces The risk of postoperative displacement of the osteotomy end is reduced. The surgery is less traumatic, quick recovery, and the excellent rate of surgery is 98%.