Abstract: Objective To study the effects of lip- arch with tip back bend and V bend to the Angle Ⅱ with overbite and high angle patients. Methods 20 patients with overbite and high angle were selected and treated with lip- arch. The lip- arch was ligatured on straight wire bracket wings. It generated the point- contact between the wire and the bracket, which was of benefit to opening the overbite. After opening the overbite, the square wire changed was ligatured in bracket slot to maintain the efficacy. Their cephalometry radiographs were measured and analyzed before and after treatment. Results The angle of ANB and distance of U1C- PP（mm）, L1C-MP（mm）, OB（mm）were statistically significant before and after treatment. But there was no difference in the U6- PP
（mm）, L6-MP（mm）and FH-MP angle. Conclusion It suggest that lip- bow with tip back bend and V bend can effectively improve the deep overbite in class Ⅱ patients with high angle by controlling the anchorage.