Benzalkonium chloride is useful against novel coronaviruses. Benzalkonium chloride is a chlorine-containing disinfectant and is mainly used clinically for pre-surgical skin disinfection and for disinfection of mucous membranes and wounds. In addition, chemicals such as ether, 75% ethanol, and peroxyacetic acid can also inactivate the virus. The virus is sensitive to ultraviolet light and heat and can also be effectively inactivated. It is important not only to kill the virus in normal daily life, but also to effectively prevent the possibility of virus infection. Therefore, it is important to wear a mask when you go out in your daily life, to go out as little as possible, and to minimize the access to public places. At the same time, usually pay attention to the circulation of indoor and outdoor air, wash hands regularly, increase nutrition, enhance the body’s resistance, improve their own immune function, can reduce and prevent the possibility of new coronavirus infection.