Hemorrhage is the major cause of death in patients with severe trauma. The early coagulopathy that occurs in patients with severe trauma, known as acute traumatic coagulopathy (ATC), has a major effect on morbidity and mortality. About a quarter of all patients with severe injury are reported to have coagulopathy at the time of arrival to hospital. The important mechanism of ATC is hyperfibrinolysis by up-regulation of activated protein C. Therefore anti-fibrinolytics are needed to treat trauma patients with ATC. Tranexamic acid (TXA) is a common anti-fibrinolytic broadly used in clinical practice. TXA is a lysine analogue and binds to lysine-binding site on plasminogen, interfering with plasminogen binding to fibrin. By inactivating plasmin, TXA can prevent hyperfibrinolysis. Clinical randomization of an anti-fibrinolytic in significant hemorrhage-2 proved TXA effective for patients significantly bleeding from traumatic injuries, reducing mortality in bleeding trauma patients without increasing the risk of thrombosis. The results of this trial led many trauma centers to include TXA in their major hemorrhage protocols. Early use of TXA is the simplest and most effective treatment to improve patient outcomes in trauma patients with significant hemorrhage. Therefore use of TXA should be considered in patients with major trauma.