Thumb reconstruction is a type of surgery to improve the function of the hand by restoring the length, flexion and extension of the thumb by means of thumb reconstruction due to thumb loss, which affects the function of the hand. If the thumb is completely missing, it is a treatment method to restore the function of the thumb by transplanting the toe. Thumb function accounts for more than half of the total function of the fingers. If the thumb is missing, the function of the hand will be seriously affected, and the function of the thumb can be restored by thumb reconstruction surgery. For example, if there is a defect in the middle part of the proximal phalanx of the thumb, you can choose tiger’s mouth deepening surgery to lengthen the length of the thumb. The first metacarpal bone lengthening surgery, cut off the middle part of the first metacarpal bone, and add the bone graft to lengthen the length, and so on. Total thumb defect reconstruction can choose to free the 2nd toe of the foot, the operation needs to repair the bone, restore the length, and at the same time tendons, blood vessels, nerves for anastomosis. After the surgery, most of the functions of the thumb can be restored after a long period of rehabilitation. Thumb reconstruction surgery is difficult, and it is recommended that patients go to a regular hospital and have the surgery performed by a specialist.