Novel coronaviruses are not SARS viruses, but they both belong to the coronaviridae, genus Coronaviridae, which are RNA viruses, a large group of viruses that are widely found in nature. It has a thin film and the particles are round or oval, often polymorphic, with a diameter of 60-140 nm. The viral morphology, when observed under electron microscopy, resembles the spines or crown of the corona and gets its name. In nature, coronaviruses are widely present in animals, but have the distinct characteristic that they must depend on host cells to reproduce and can cause respiratory, gastrointestinal, liver and neurological diseases in humans and animals. Current studies have shown that the novel coronavirus has more than 85% homology with SARS coronavirus, and its genetic characteristics are significantly different from SARS coronavirus and MENS coronavirus. The novel coronavirus is the seventh known coronavirus that can infect humans, along with SARS coronavirus and MENS coronavirus. The above three viruses are very pathogenic, while the other four are not so pathogenic.