Whether left-handed or right-handed, we recommend preserving the floating bunion. The main clinical feature of floating bunion is the lack of metacarpal bone or only metacarpal bone remains, the thumb has no internal bone support, hanging like a small meatball on the hand, unable to do anything but swing with the hand, which creates a false impression that this finger is useless. Is this really the case? No, the floating thumb has internal blood vessels and nerves, with sensory functions, can sense heat, cold and pain, such a finger if the direct excision to do finger bunionization is really a pity. Once the thumb is removed, the child will be left with only four fingers forever, which is irreversible. Apart from being aesthetically unpleasing, the thumb may also have a psychological impact on some introverted children, so many parents would prefer to keep the thumb. At present, we mainly adopt the technique of hemi-metacarpal bone graft reconstruction to save the five fingers, taking part of the bone from the second metacarpal of the affected hand to reconstruct the first metacarpal, and the whole operation is only done on the hand without moving other parts of the child’s body. The surgery is divided into two phases, the first phase to move the bone, so that the thumb has a better shape, the second phase to establish the function, so that the thumb can move, after the two phases of the operation can begin to function exercise, as long as all aspects of the cooperation is good, the overall effect is more ideal.