Background :AKI is a common complication among human immunodeficiency virus (HIV)--infecting patients and resulting in increased morbidity and mortality. CRRT is a useful method and instrument in critically ill patients with fluid overload and metabolic disarray, especially in those who are unable to tolerate the intermittent hemodialysis. However, the epidemiology, influence factors of CRRT and mortality in patients with HIV/AIDS are still unclear in China. This study aims to study the HIV-infected patients admitted in ICU and explore the influence factors correlated with CRRT and prognosis.Methods: We performed a retrospective case-control study, in ICU of Beijing Ditan Hospital Capital Medical University, which is a top three hospital majoring in infectious diseases. From June 1,2005 to May 31,2017, 225 cases were enrolled in this research eventually.Results: 122(54.2%) patients were diagnosed with AKI during their stay in ICU, the number and percentage of AKI stage 1/2/3 were respectively 38(31.1%)/23(18.9%)/61(50%). 26.2% of AKI patients received CRRT during the stay of ICU. 56.25% CRRT patients died in ICU. The 28-day mortality was 62.5%, and the 90-day mortality was 75%. By multivariate logistics analysis, it showed that the use of vasoactive agents (OR=174.31,95% CI 1.743-65.271, p=0.018), diagnosis of PCP(OR=27.136,95% CI 1.855-397.066, p=0.016) and longer duration of CRRT (OR=1.034,95% CI 1.004-1.065, p=0.028) were independent risk factors for predicting patients’ death of CRRT in ICU. The Cox Analysis for the cumulative survival of AKI 3 patients between the CRRT and non-CRRT groups shows no significant differences (p =0.309).Conclusions: The incidence of AKI was 54.2% in HIV-infected patients admitted to the ICU, and about 26.2% AKI patients received CRRT during the stay of ICU.56.25%CRRT patients died in ICU. The 28-day mortality was 62.5%, and the 90-day mortality was 75%. The use of vasoactive agents, diagnosis of PCP were independent risk factors for predicting patients’ death of CRRT in ICU. The cumulative survival of AKI 3 patients between CRRT and non-CRRT groups shows no significant differences.