Objective To explore the feasibility of repairing the skin and soft tissue defect at finger palm side with the reversed free thenar mini-perforator flaps.Methods From October,2010 to October,2016,7 patients were treated with reversed free thenar mini-perforator flap to repair skin and soft tissue defects at finger palm side,including 5 males and 2 females,which the age were between of 17 and 56 (average,35 years old).Cause of injury:1 case of abrasive wear,1 case of machine twist injury,and 5 cases of heavy injury.All cases with varying degrees of phalanx and tendon exposed.The wound size was from 1.3 cm × 2.0 cm to 2.2 cm × 5.0 cm.According to the origin of the artery in the thenar area,3 kinds of reversed free thenar mini-perforator flaps were designed to repair the defective wound.In the middle of the large fish,the width less than 2.5 cm perforating flap was designed,so that the area can be directly sutured.Results All 7 flaps survived.The flap size was from 1.5 cm × 2.4 cm to 2.5 cm × 5.5 cm.All patients were followed-up from 3 months to 17 months (average,9 months).The appearance and skin texture of flaps was close to the normal finger palm side of the skin,with a clear fingerprint.Two-point discrimination was between 9 mm and 15 mm.The sensory recovery to S3 in 3 cases,S4 in 4 cases.Linear scars were left in the donor areas,with no discomfort.Conclusion This technique has the advantages of good appearance,such as good appearance and small damage to the donor area.However,the surgeon is required the super microscopic techniques.