Objective: To research and analyze the risk factor which lead to type Ⅲ operation incision infection,and prevent the incision infection.Methods: The clinical data of 1816 typeⅢoperation incision patients from the general surgery department during 2001-2016,With incision infection serving as a dependent variable, gender, age, using medical films, rinsing the incision with iodophor after the abdomen closing and other factors as independent variables, single factor analysis and logistic regression analysis were used to identify risk factor for typeⅢoperation incisions.Results: From 1816 typeⅢoperation incision patients,218 patients suffered from incision infection with a infection rate of 12%,Single factor analysis showed that 8 factors had significant effects on infection of type Ⅲ operation incision(P<0.01). Logistic regression analysis showed that there were 8 related factors out of 9 factors,and age,anesthesia,blood transfusion,the days of hospitalization and emergency surgery were possible independent risk factors of incision infection(P<0.01), and the critical pathway,using medical films,rinsing the incision with iodophor after the abdomen closing,reasonable use of antibiotics were protective factors against incision infection(P<0.01),while age,anesthesia,blood transfusion,the days of hospitalization and emergency surgery were possible independent risk factors of incision infection(P<0.01).Conclusion: Using medical films before the skin incising, rinsing the incision with iodophor after the abdomen closing can reduce the rate of incision infection postoperation, it is worthy of clinical promotion.