There is a difference between flat feet and flatfoot syndrome. If flat feet do not have symptoms of weakness in walking, difficulty in putting on shoes, or painful walking, no treatment is needed. Many people have flat feet but do not have the above symptoms, even athletes who have been exposed to many professions in general have flat feet but do not have symptoms and have very good athletic traits and do not need treatment. If the flatfoot has pain, limited activity, walking weakness, and difficulty in wearing shoes, treatment is needed mainly in the following two ways: 1. conservative treatment, by making custom-made insoles, configuring special insoles through the different stress distribution on the bottom of the foot, correcting the symptoms caused by uneven stress distribution and flattening of the arch, it can relieve the patient’s walking pain and discomfort; 2. surgical treatment: by treating the flatfoot disease Tendon lesions caused by flatfoot syndrome, such as peroneal tendon lesions and posterior tibial tendon lesions, as well as bony structures brought about by flatfoot syndrome, such as severe heel exostosis, osteoarthritic manifestations of the subtalar joint, talar navicular joint and heel dice joint, and restoring the foot arch by adjusting the osteotomy force line and joint fusion to achieve ideal treatment results.