This child had a complex syndactyly with fused phalanges, and the length of the fused phalanges was relatively long, and there was a large amount of exposed bone after the splitting of the phalanges. During the surgery, we used a partial flap to cover the wound, but a large portion of the exposed bone could not be covered well, so we used artificial dermis to cover the wound, and assisted with postoperative support therapy, and the final appearance and function of this child’s finger were very good. When splitting a complex syndactyly, the traditional approach is to perform flap repair, but flap repair increases the surgical risk, and the postoperative scar is also larger, and sometimes the appearance is not particularly ideal. Skin grafting is also not a good solution to the problem because there is bone exposure, so we need to overcome and solve some problems during the operation. If we use the artificial dermis induced implant-free technique, all these problems are overcome.