A mother came to me and told me that her newborn daughter had a strange thumb, which had no strength and could not move on its own. The mother was so worried about this that she paid extra attention to her daughter’s thumb during her monthly period, fearing that it might get tangled up and strangle her thumb off. The mother took her daughter to the local hospital for a checkup after she got out of the month, and learned that her daughter had a floating thumb that had to be corrected through surgery, but she was silenced by the surgery plan given by the doctor. The doctor said that her daughter’s thumb metacarpal bone was almost completely missing and the pituitary was too thin, so he suggested to treat her by means of schematic thumbing, which means to cut off the thumb directly and move the index finger to the thumb position to use as a thumb. The mother said she wanted her daughter to be able to stretch out her little hand in front of people in the same way as others, and she didn’t want her daughter to develop a low self-esteem in the future because of the floating thumb. She has looked up a lot of information on the internet and will take her daughter to see it whenever there is a little hope. Currently, our main surgical option for treating floating thumb is the hemi-metacarpal bone graft reconstruction technique, which takes part of the bone from the second metacarpal of the affected hand to reconstruct the first metacarpal. Both the donor and recipient metacarpal bones can continue to grow after surgery, allowing the baby to have thumb function as well as preserving the five fingers. This type of surgery minimizes the impact of the surgery on the child. Since the problem is in the hand, the surgery is performed only on the hand and does not involve the rest of the child’s body. With good post-operative cooperation in all areas, the baby’s thumb can be greatly enhanced in function and appearance.