The new crown vaccine is mainly made of inactivated live vaccine, supplemented with sodium chloride, disodium hydrogen phosphate, aluminum hydroxide, etc. Sodium heparin is mainly used for the treatment of new crown pneumonia. The inactivated new coronavirus is the main active ingredient of the inactivated new coronavirus vaccine, usually the new coronavirus is inactivated and processed to act on the human body as an antigen to stimulate the body to produce an immune response to achieve the preventive effect. Sodium chloride, disodium hydrogen phosphate and aluminum hydroxide are the main excipients, and vaccination is contraindicated for people with severe allergies to the ingredients. The mortality rate of new crown pneumonia is closely related to changes in coagulation function and thrombosis, heparin sodium is a drug for the prevention and treatment of thromboembolism, which is mainly used for anticoagulation and antithrombotic treatment of patients with severe cases of new crown pneumonia, to improve the prognosis of the patients and to reduce the morbidity and mortality rate. New crown vaccine has a certain degree of safety and effectiveness, in order to slow down the spread of the epidemic, without contraindications, it is recommended to follow the doctor’s advice to complete the vaccination in a timely manner. Tip: “New coronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.