The crab-like compound thumb is one of the more difficult surgeries for compound thumb deformities, the most common being the 4D type. The proximal phalanges occupy the metacarpophalangeal joint surface and the interphalangeal joints are angled, making the surgery quite difficult. The classical BC surgery (finger bone and nail splicing) directly affects the function of the joint, and the permanent postoperative nail longitudinal ridge also significantly compromises the appearance. In addition, rough osteotomies can damage the epiphysis, and doctors always delay surgery until very late, obviously losing the opportunity to reshape the developing finger. In recent years, we have improved our surgical approach in the Department of Plastic and Reconstructive Surgery at the Ninth Hospital. Please see our case: The surgery cleverly uses the reorganization technique of power, the internal fixation technique of new absorbable material, which eliminates the damage to the joint and the infection of the nail tract due to the fixation through the kerf pins. A very good reconstruction of function and shape was achieved. The first visit I request is from August to December. Please upload photos of your child from online in advance to obtain evaluation and follow-up.