The present invention designs a simple and safe, minimally invasive stripping knife operation method under the guidance of C-arm machine and B-ultrasound for the treatment of adult congenital oblique neck, which achieves less trauma, less pain, faster recovery and better results without scarring after surgery. The invention is realized in this way: it consists of five parts: high precision ultrasound and C-arm X-ray machine positioning guidance, minimally invasive stripping knife operation method, special surgical position, minimally invasive stripping and loosening part of the severing and lengthening operation and special rehabilitation training exercises. 1. special equipment: 1) Ye’s minimally invasive stripping knife, 2) imported C-arm X-ray machine, 3) high precision ultrasound machine 2. minimally invasive stripping knife operation method: minimally invasive stripping knife (I have applied for a patent) (See attachment – Minimally invasive stripping knife application form) in high precision ultrasound and C-arm X-ray machine positioned under the guidance of the work channel forward while separating to find the more tense contracture tissue; use the tip of the blade first parallel to the trailing edge of the forward moving contracture tissue, the side of the minimally invasive stripping knife parallel to the deep side of the contracture tissue deeper in front of the tip and operating handle placed in the 3.Specialized surgical position: not announced yet. 4.Minimally invasive stripping and loosening part of the cut-off extension: set the disposal position, use the minimally invasive stripping knife to take only a 3mm long incision in the neck, and only peel off and loosen a 3mm wide working channel in the direction of the contracture tissue. The knife head and handle are placed on the deep surface of the contracture tissue, and the contracture tissue is separated in layers with the back of the minimally invasive stripping knife, and then the contracture tissue is cut off with the sharp edge of the knife head. The advantages of the invention are simple apparatus, easy operation, short operation time, less trauma, less pain, quick recovery, good effect, safe and reliable operation, and easy to master. After the surgery in the orthopedic department of Yangpu Geriatric Hospital in Shanghai and the orthopedic department of Bengbu Hospital in Anhui Province for adult congenital oblique neck of type A, B and C, it is proved that the minimally invasive treatment can be used to walk on the ground and move the neck freely one day after the surgery, and the patient can be discharged from the hospital in four days. Since the minimally invasive scar is extremely small and basically disappears after one month, there is no psychological stress caused by the obvious scar on the neck, so it is easily accepted by adult congenital squint patients to benefit them. The scar left after open surgery is a lifelong regret for the patient because of the tendency of congenital squints to overgrow fibrous tissue. Our group has been conducting research on congenital oblique neck for nearly 20 years, and has conducted applied anatomical studies, pathological studies, and controlled clinical follow-up studies on congenital oblique neck, and clarified the anatomical and pathological basis of peel-and-knife lengthening surgery for adult congenital oblique neck. It is a new operation with short operation time (1 to 2 minutes for one side of the scalpel), small trauma (only a 3mm long incision is made on one side of the hip, and only a 3mm wide working channel is stripped and loosened in front of the greater trochanter), complete loosening (superficial and deep contracture tissues can be completely loosened), less pain (no pain during the whole operation), fast recovery (4 days after the operation, the patient is discharged to resume normal life), good effect (no scar is left after the operation, and the head and neck move like normal people), safe and reliable operation. This technique can treat 98% of patients with hip contracture (type A, type B, type C), and the excellent rate of treated patients is currently 100%, and it has broken through the traditional age limit of adult congenital squint treatment (the traditional method of treatment is not ideal after the age of 17, while the “minimally invasive plastic treatment for contracture “(The highest age of treatment has exceeded 53 years old). Since this operation is safe, reliable, simple and easy to master without the investment of expensive equipment such as arthroscopy, it can be promoted nationwide and even worldwide, especially suitable for promotion in mountainous areas and rural areas where this disease is prevalent.