Fom march Ⅰ98Ⅰ to June Ⅰ988, twenty-one hands in Ⅰ9 patients with congenital adduetion-flexion deformity of thumb were treated by various methods. The good appearance and function were obtained in Ⅰ8 cases. Appearance and function were improved in 3 cases. The author indicated that thorough soft tissue releasing, keeping stability of MP joint and deepening first web were the key points in achieving operation success.