Sepsis 3.0 is defined as a life-threatening organ dysfunction caused by the host' uncontrol response to infection, with poor prognosis, high morbidity and fatality. Sepsis is one of the main causes of death in severe patients. As lack of comprehensive recognition of its pathogenesis, there were not specific treatment on it. It is reported that the T-cell immunoglobulin and mucin-domain-containing molecule (Tim) of Tim-1 play critical role in sepsis inflammation, immune tolerance and apoptosis, which is relative specific factor in assessment of sepsis prognostic and treatment efficiency, indicating that it could be a novel target in sepsis as well as provide a novel direction. This article mainly stated the discovery, structure, distribution and immune effect of Tim-1 as well as the possible role of TIM-1in immunosuppression, lymphocyte proliferation and apoptosis, in order to provide reference for further research the treatment of sepsis.