Rupture of the tendon of the little finger is mainly due to traumatic factors, resulting in excessive flexion and extension of the little finger, which leads to rupture of the tendon. After rupture of the tendon of the little finger, the symptoms of localized swelling and pain in the little finger are often seen. At the same time, there may be deformity of the little finger and limitation of the function of flexion and extension of the little finger. Early presentation to the hospital’s surgical clinic is required. The injury is clarified through history taking, physical examination, and ancillary tests such as X-rays. The treatment of this injury should be analyzed in relation to the severity of the tendon rupture. If the injury is minor and the tendon is partially ruptured, the little finger can be immobilized with a small splint, usually for about 4 to 6 weeks, to promote the healing of the injured tendon. If the tendon is completely ruptured, it must be repaired surgically by anastomosis. Local immobilization is also required after surgery to ensure smooth healing of the tendon. During the recovery process, attention should be paid to regular review, and in conjunction with the recovery situation, patients should be instructed to carry out functional exercises for the fingers to promote the functional recovery of the fingers.