Objective To sum up the experiences of subtrochanteric valgus osteotomy for congenital coxa vara and seek out a the way to the simple and effective operation.Methods Inserting Steinmann′s wire in the femoral neck and making a volgus asteotomy in a shape of “▲” under tuberositas in children patients with congenital coxa vara,8 cases,with a collodiaphysial angle of 86° to 100°.Results The collodiaphysial angles in all our cases were corrected to normal size,so were the Hilgeneriner epiphysis angles (HEA) postoperatively.Conclusion Guided by Steinmann′s wire,subtrochanteric valgus osteotomy under the rotors for congenital coxa vara is simple and has a statisfying effect.