Objective To compare the color,temperature,tension and capillary filling in different flaps repair surgery,including free physiological flap,fascial pedicle skin flap,venous skin flap and cutaneous neurotrophic skin flap,so as to provide some directions for clinical observation.Methods From March 2011 to December 2011,totals of 221 patients with 223 flaps were involved in this study.They were divided into four groups:free physiological flap group(n =50),fascial pedicle skin flap group(n =66),venous skin flap group (n =57),cutaneous neurotrophic skin flap group (n =48).The peri-operation investigation was adopted,and the color,temperature,tension and capillary filling in different flaps after operation were observed and compared.Results In free physiological flap group,the incidence of grey and dark red respectively was 20%and 38%,and the rate of tension bullae and disappearing of capillary filling respectively was 32% and 8%,which was significantly lower than that in others groups (x2 =20.64,49.90,36.99,36.16,respectively;P <0.01).Conclusions The blood circulation change must be paid more attention within 24 hours after operation in all the four flap.The observation of grey stage could be shortened to 2 hours,and the disappearing of capillary filling could be 12 hours.The four index of blood circulation of fascial pedicle skin flap must be observed within 7days after operation. Key words: Blood circulation; Free physiological flap; Fascial pedicle skin flap; Venous skin flap; Cutaneous neurotrophic skin flap