At room temperature, the new coronavirus can survive for about 48 hours after leaving the host. The survival time of the new coronavirus is closely related to the environmental temperature and humidity, and the new coronavirus generally survives for a longer period of time in a moist and cold environment, such as at minus 4 degrees Celsius, where it can survive for several months, and if it is at minus 20 degrees Celsius, the new coronavirus can survive for 20 years, which may be the reason that the new coronavirus This may be the reason why novel coronaviruses tend to become prevalent in winter and spring. However, the novel coronavirus is not heat-resistant and does not tolerate high temperatures. When the ambient temperature is as high as 56℃, the novel coronavirus can be inactivated within 30 minutes. If exposed to strong ultraviolet light, the novel coronavirus can be killed within one hour. At room temperature, the activity of the new coronavirus decreases by more than 80% two hours after it leaves the host, and the new coronavirus almost loses its activity after 5-48 hours, so high temperature can effectively kill the new coronavirus.