Saline can clean the wound, can effectively remove the foreign body within the wound, usually after cleaning with saline, need to be thoroughly sterilized, making the wound become clean wound, to avoid infection. Saline is commonly used in clinical wound irrigation agent, can effectively remove the foreign body within the wound, such as trauma residual dust, or persistent foreign body discharge wound, pus wound, etc., can be first through the saline for simple cleaning, can effectively avoid infection, keep clean. Since saline is not strong in sterilization, other disinfectants such as iodophor are needed to disinfect the wound after rinsing. When disinfecting the wound with 3% hydrogen peroxide, it is necessary to rinse off the hydrogen peroxide on the wound with saline.