Abstract: Objective:To explore the therapeutic effect of microexternal fixation combined with forearm interosseous dorsal skin flap for the repair of severe tiger contracture.Methods:Fortytwo patients with severe tiger mouth contracture were divided into two groups by random number expression.The control group was treated with miniature external fixator combined with retrograde radial artery snuff socket perforator flap.The study group was treated with miniature external fixator.Repair of forearm interosseous dorsal skin flap.The clinical efficacy and complications were observed and compared between the two groups.The changes of the width of the tiger mouth and the width of the tiger mouth before and after operation were compared with the visual analogue scale（VAS）pain score and the skin quality of the operation site.Results:There was no difference in VAS pain score between the two groups before operation.The average VAS pain score of study group after surgery was（1.3±0.8），while the score of control group was（2.5±0.8）（P<0.05）.The effective rate of the study group was 85.7%，the control group was 76.2%；the concurrent rate of the study group was 28.6%，the control group was 66.7%；the quality of life of the study group was higher than that of the control group（all P<0.05）.Conclusion:Mini external fixator combined forearm interosseous dorsal skin flap to repair severe contracture has good treatment effect，not only can reduce the postoperative complications，can effectively repair in escaping angle and tucks width and reduce postoperative pain of patients，has wide application prospect，is worth further promotion and application in clinic.

Key words: micro external fixator, interosseous dorsal flap, tiger contracture