OBJECTIVE：To analyze the occurrence of acute kidney injury （AKI）after lung transplantation and its possible influential factors . METHODS ：Medical records of 64 patients who received lung transplantation in our hospital from April 2017 to June 2018 were included in this retrospective study. Patients were divided into AKI group （44 cases）and non-AKI group （20 cases），according to whether AKI occurred after operation. According to diagnostic criteria for lung transplantation in our hospital ， all patients were given Methylprednisolone sodium succinate for injection or Methylprednisolone sodium succinate for injection combined with Basiliximab for injection ，and triple immunosuppressive therapy of Tacrolimus capsules+Mycophenolate mofetil dispersible tablets or Mycophenolate mofetil capsules or Mycophenolate sodium enteric-coated tablets+Methylprednisolone tablets or Prednisone acetate tablets were given after operation. The occurrence of AKI in AKI group within a week after operation were recorded. Intraoperative influential factors （operation type ， operation duration ， ECMO support ， immune inhibitor use ， intraoperative blood loss ），postoperative influential factors [days of ICU ，mechanical ventilation and ECMO support ，median value of Scr within one week after operation ，median tacrolimus concentration and the use of potential nephrotoxic drugs （≥4 kinds）， hospitalization days] and survival rate one year after operation were observed in 2 groups. RESULTS ：Within one week after lung transplantation，44 patients（68.8％）had experienced at least one episode of AKI ，among which 19 cases（29.7％）were stage 1， 17 cases（26.5％）were stage 2 and 8 cases（12.5％）were stage 3. The incidence of AKI was the highest on post-operative day 4 （57.4％）. The incidence of AKI at stage 3 exhibited growth trend within the first week after operation ，and reached the highest on median post-operative day 5（8.7％）. Operation duration ，median value of Scr within one week after operation ，median tacrolimus concentration in non-AKI group were significantly shorter or lower than AKI group ；there was no significant difference in operation type， ECMO support ， use of immunosuppressive agents ， intraoperative blood loss ，ICU days ，mechanical ventilation days，ECMO support days ，the utilization rate of potential nephrotoxic drugs （ ≥4 kinds） and hospitalization days between 2 groups （P＞0.05）. There was no statistical significance in the survival rate at stage 1 and 2 one year after operation between AKI group and non-AKI group （P＞0.05）. One year after operation ，survival rate of AKI group at stage 3 was significantly lower than that of non-AKI group （P＜0.05）. CONCLUSIONS：The incidence of AKI is high after lung transplantation. Operation duration ，median value of Scr within one week after operation ，median tacrolimus concentration were possible factors for the occurrence of AKI after operation.