Objective:To investigate the risk factors for postoperative complications in emergency surgery for traumatic colon injury.Methods:In this study, a retrospective cohort study was used to collect the case data of 59 patients diagnosed with traumatic colon injury and emergency surgery in the PLA General Hospital from March 1, 2011 to March 31, 2023. According to whether complications occurred after emergency surgery, the patients were divided into the complication group( n=30)and the non-complication group( n=29). The main observation indexes were complication rate, Clavien-Dindo classification of complications, and risk factors related to complications. Normally distributed measurements were expressed as mean±standard deviation( ± s), and t-test was used for comparison between groups. Count data were compared between groups using the chi-square test. Clinically significant risk factors for predicting the occurrence of postoperative complications were determined by univariate and using multivariate logistic regression analysis. Results:A total of 56 occurrences of complications in 30 cases. 15 cases had multiple complications. Clavien-Dindo classification consisted of 23 cases of grade Ⅱ(41.1%), 1 cases of grade Ⅲa(1.8%), 6 cases of grade Ⅲb(10.7%), and 1 case of grade V(1.8%). The top three complication rates were 16 cases(28.6%) of pneumonia and(or) pleural effusion, 12 cases(21.4%) of incision infection, and 9 cases(16.1%) of postoperative bleeding. Univariate analysis showed that body mass index<24 kg/m 2, operation duration>235 min, intraoperative blood loss>100 mL, AAST-OIS grade≥4, preoperative serum albumin<35 g/L, preoperative white blood cell count>10×10 9/L, and preoperative procalcitonin≥2 ng/mL were risk factors for postoperative complications in traumatic colon injury underwent emergency surgery( P<0.05). Multivariate logistic regression analysis showed that body mass index<24 kg/m 2( OR=144.047, 95% CI: 3.695-5 614.986, P=0.008), preoperative serum albumin <35 g/L( OR=116.430, 95% CI: 3.582-3 784.038, P=0.007), preoperative procalcitonin≥2 ng/mL( OR=13.412, 95% CI: 1.030-174.662, P=0.047), and AAST-OIS grade≥4( OR=134.509, 95% CI: 3.934-4 599.473, P=0.007) were risk factors for postoperative complications in traumatic colon injury underwent emergency surgery. Conclusion:body mass index<24 kg/m 2, preoperative serum albumin<35 g/L, preoperative procalcitonin>2 ng/mL and AAST-OIS grade≥4 are risk factors for postoperative complications of traumatic colon injury. Early targeted treatment for patients with risk factors can help improve prognosis.