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Surgery of Oral cancer was unique so as to its important anatomical structure in head and neck region.Different sites of the oral cancer had own characteristics.The tissue and functional defect was along with radical surgery.So soft and hard tissue reconstruction was obligatory.Free flap reconstruction was prior in large and complex defect.From 1979 to 2013,3598 soft free flaps included forearm flap,latissimus dorsi myocutaneous flap,pectoralis major myocutaneous flap (PMMF),anterial lateral thigh flap and lateral arm flap,et al.