Objective?The necrosis rate after replantation of severed finger was recorded and the related factors of necrosis were analyzed to provide reference for clinical prevention and intervention. Methods?The clinical data of 70 patients who underwent finger replantation in Beijing Red Cross Peace Orthopaedic Hospital from January 2020 to June 2021 were collected,and the success of operation and the occurrence of postoperative necrosis were recorded. According to postoperative outcomes, the patients were divided into necrosis group (10 cases) and nonnecrosis group (60 cases). The Logistic multifactor model was used to analyze the related factors of necrosis after replantation. Results?There were 10 cases of postoperative necrosis occurred in the 70 patients, and so the necrosis rate was 14.29%. In the necrosis group, the number of finger amputation and the ratio of arterio-venous repair in 1 ∶ 0 were significantly higher than that in the non-necrosis group. The postoperative infection rate and the incidence of postoperative skin hypothermia were significantly higher than that in the non-necrosis group. The time of finger amputation ischemia was significantly longer than that in the non-necrosis group. The elasticity of finger abdomen after operation was worse than that in the non-necrosis group, and the degree of depression was worse than that in the non-necrosis group (P ＜ 0.05). The Logistic multivariate analysis showed that the ischemic time (95%CI=1.029~3.308, OR=1.845, P=0.040), postoperative skin temperature (95%CI=1.337~6.373, OR=2.919, P=0.007), postoperative infection (95%CI=2.067~8.457, OR=4.181, P=0.000), proportion of arteriovenous repair (95%CI=1.536- 6.204, OR=3.087, P=0.002) and degree of depression (95%CI=1.308~6.045, OR=2.812, P=0.008) were influential factor for postoperative necrosis in patients undergoing finger replantation. Conclusion?There is a risk of postoperative necrosis in patients who underwent replantation of severed finger. The postoperative necrosis is related to ischemic time of severed finger, postoperative skin temperature, postoperative infection, arteriovenous repair ratio and depression of patients, which should be paid attention by medical workers.