Delta virus is a mutant strain of New Coronavirus, which is more infectious and easier to spread than the original strain of New Coronavirus. It is generally believed that delta virus can stay on the surface of an object at room temperature, and the colder the temperature, the longer the survival time of delta virus. However, there are no clear experimental studies to show how long delta virus can survive on the surface of an object, which can be analyzed by referring to the original strain of the new coronavirus. Studies have shown that the original strain of NIV can survive for about 4 hours on copper, 24 hours on paper, and more than 2 days on plastic and stainless steel at the same room temperature and humidity. For delta virus, the survival time on the surface of the object may be longer. Delta virus can be spread by respiratory droplets from infected persons, or by infected persons touching the surface of objects to which the delta virus adheres, and others then touching the contaminated objects; delta can also be spread by aerosols under certain conditions. To avoid infection with delta virus, it is recommended to receive the new crown vaccine in a timely manner, do personal hygiene protection, wash hands regularly, wear a mask, maintain a certain social distance, and enhance physical fitness. Disinfection of frequently touched surfaces with 75% alcohol and chlorinated disinfectants can be used to effectively kill the delta virus.