Objective To investigate the predictive value of lymphocyte count(LYM),interleukin-6(IL-6)and D-dimer(DD)combined detection on the 28 day prognosis of patients with sepsis.Methods Patients with sepsis 3.0 admitted to the People's Hospital of Xinjiang Uygur Autonomous Region from January 2023 to November 2023 were retrospectively selected.The clinical data of pa-tients were collected and divided into groups according to their survival at 28 days,and the levels of LYM,IL-6 and DD were compared.Draw the receiver operating characteristic(ROC)curve and calculate the area under the curve(AUC),the 28 days Kaplan-Meier sur-vival curve was plotted according to the cut-off value determined by the ROC curve.Results Finally,107 patients with sepsis were in-cluded,of which 66survived and 41 died within 28days.The levels of DD and IL-6 in the death group were significantly higher than those in the survival group,and the level of LYM was significantly lower than that in the survival group,and the difference between groups was statistically significant(P＜0.05).The results of multivariate COX regression analysis showed that LYM,IL-6 and DD were all risk factors for 28days death(P＜0.05).The results of ROC curve analysis showed that the AUC of LYM,IL-6 and DD combined detection was greater than that of single detection(0.909 vs 0.821,0.788,0.807).The results of Kaplan-Meier survival curve analysis showed that the 28days survival rate of patients with LYM≤0.52 × 109/L was significantly lower than that of patients with LYM＞0.52 × 109/L.The 28 days survival rate of patients with IL-6 ≥551.45pg/ml was significantly lower than that of patients with IL-6＜551.45pg/ml.The 28 days survival rate of patients with DD≥3.25mg/L was significantly lower than that of patients with DD＜3.25mg/L.Conclusion DD,IL-6 and LYM are all valuable in predicting the 28d prognosis of sepsis,and the combined detection of the three indicators is better than the single detection,which is expected to provide help for clinicians in the diagnosis and treatment of sepsis.