The reason why disposable medical masks must meet the standard nowadays, people pay more and more attention to their health, so people wear masks when they go out. However, people tend to use medical masks when wearing disposable medical masks. As we all know, it is necessary to make a brief introduction to the following standards for the production of small masks. In recent years, the hospital has paid enough attention to the nosocomial infection caused by the spread of pathogens in the hands of medical equipment and medical staff, and has taken corresponding measures. Some bacteria may deposit on the surface of the mask due to dust after the nurse is engaged in morning and evening care. Nurses and patients often contact, in addition to life care, also need to complete a lot of daily work. If the number of bacteria exceeds the standard after morning care, deep vein puncture catheter, urethral catheterization, high asepsis requirements, bacteria can follow the operator's mask and head movement landing, no fungal surface, once pathogenic bacteria and drug-resistant strains enter the body, It will cause iatrogenic infection, and the bacteria on the mask of breathing movement will become the nurse's own body and affect the health of the nurse. In order to prevent this phenomenon, surgical masks are specially listed as the use standard of medical machinery, and the manufacturers are required to operate according to the requirements during manufacturing. (1) Filtration efficiency: under the condition of air flow rate (30 ± 2) l / min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter of (0.24 ± 0.06) μ m should not be less than 30%; (2) bacterial filtration efficiency: under the specified conditions, the filtration efficiency of Staphylococcus aureus atcc6538 should not be less than 95%; (3) Pressure difference: under the specified conditions, the pressure difference between the two sides of the mask for gas exchange should not be greater than 49pa; (4) synthetic blood penetration: after 2ml of synthetic blood is sprayed to the outer side of the mask at the pressure of 16.0kpa (120mmhg), the inner surface of the mask should not be penetrated. It is used to wear on the mouth and nose of medical staff in the operating room to prevent dandruff and respiratory tract microorganisms from spreading to the open surgical wound surface, and prevent the body fluid of surgical patients from spreading to the medical staff, so as to play the role of two-way biological protection. Proper wearing of masks is an effective way to block the transmission of respiratory secretions. Medical surgical masks can prevent the spread of respiratory infectious diseases.