Objective To investigate the regulatory effect of testosterone propionate injection combined with ulinastatin on immune imbalance in patients with sepsis.Methods A total of 88 patients with sepsis treated in our hospital from October 2019 to January 2020 were randomly divided into observation group and control group,with 44 cases each.The control group was treated with ulinastatin combined with routine treatment,while the observation group was treated with testosterone propionate injection additionally.The clinical efficacy difference between the two groups were compared after treating 1 week.The levels of inflammatory factors [interleukin-6 (IL-6),interleukin-10 (IL-10),interleukin-1 β (IL-1β)],testosterone (T),albumin (Alb),the severity of disease (APACHE II score) and the degree of organ failure (SOFA score) in the two groups were observed before and 1 week after treatment.The differences of adverse drug reactions between the two groups within 1 week of treatment were analyzed.Results The total effective rate of the observation group was higher than that of the control group (P＜0.05).IL-6 and IL-1β levels and APACHE II and SOFA scores decreased after treatment,while those of the observation group were lower than the control group (P＜0.05).The levels of IL-10,T and Alb in the two groups were increased,while those in the observation group were higher than the control group (P ＜ 0.05); the total incidence of adverse drug reactions in the two groups was not statistically significant (P>0.05).Conclusions Testosterone propionate injection combined with ulinastatin had good clinical efficacy in the treatment of sepsis,effectively improved the condition and prognosis,and had positive significance in the regulation of immune imbalance.