The treatment of spontaneous flexor tendon rupture is surgical treatment, drug treatment, general treatment and other ways of diagnosis and treatment. 1. Surgical treatment: under brachial plexus anesthesia, the site of tendon rupture should be explored surgically, the site of rupture should be clarified, and the ruptured tendon should be sutured with tendon transfer and tendon autotransplantation, and it should be externally fixed with plaster after suturing, and the plaster should be removed four weeks after the operation. 2. Medication: Amoxicillin capsules and cefaclor tablets will be used for anti-infective treatment after the operation, and ibuprofen and celecoxib will be used for analgesic treatment when the pain is more serious. 3. General treatment: after removing the plaster, the patient will be given the activities of finger extension and wrist extension; the diet should be light and rich in nutrition. Spontaneous rupture of flexor tendon should be treated in a timely manner in the hospital, so as to avoid delaying the condition. The use of drugs should be in accordance with medical advice.