The baby’s right thumb floats and has no function, and when holding things, he can only use his index and middle fingers to hold them. Seeing their babies in this condition, parents will be very heartbroken and anxious, hoping to preserve their five fingers. How to preserve them? There are two methods, the first method is half metatarsal bone reconstruction and the second method is half metacarpal bone graft reconstruction. Now the method we use is the hemimetacarpal bone graft reconstruction, the operation has to be done in two phases, the first phase is to reconstruct the skeleton, and the second phase is to reconstruct the function. So how is the function of hemi-metacarpal bone graft reconstruction after surgery? From our follow-up, the postoperative appearance and functional recovery is still relatively satisfactory, the child can hold a pen to write, hold a relatively large cup of water, can also hold small particles, such as green beans, red beans, rice grains, etc., and can do both fine activities and activities with strength.