Hemocoagulase for injection is mainly used clinically for bleeding disorders, for the prevention of bleeding, such as pre-surgical use to reduce intra-operative and post-operative bleeding, and also for bleeding disorders such as gastrointestinal bleeding and hematologic disorders, and this drug is more suitable for bleeding patients in whom traditional hemostatic drugs are ineffective. Hemagglutinin has prothrombin-like effects and promotes platelet aggregation at the site of vascular injury, which in turn produces a series of reactions that promote thrombosis at the site of bleeding and achieve hemostasis. This drug can be injected intramuscularly or subcutaneously, and it can take effect in 5-10 minutes, and the effect can last for more than 48 hours. Adverse reactions are rare, and allergic reactions are occasionally seen.