Objective：To analyze the epidemiological characteristics of 90 cases of coronavirus disease 2019（COVID-19） in Yongchuan Hospital of Chongqing Medical University，and to provide an evidence for COVID-19 to formulate and implement targeted prevention and control measures. Methods：Ninety cases of COVID-19 confirmed patients admitted to a designated hospital in Chongqing were taken as the research object from January 21st to February 20th，2020 and the epidemiological and clinical data were collected. The population distribution，regional distribution and time distribution of the cases were collected. And clinical characteristics. Results：The first case was diagnosed in western Chongqing since January 21. As of February 20，there were cases in eight districts and counties in western Chongqing，with a total of 90 patients. The peak onset occurred on day 2-1，with a maximum of 9 cases per day，and then gradually decreased. 36.67%（33/90） of the cases have a history of living and traveling in the epidemic area；63.33%（57/90） have close contact with people who have been to the epidemic area，and there is a cluster of cases. The male-to-female ratio was 1.37∶1； the minimum age was 3 years old and the maximum age was 89 years old. The average age was （48.15±17.63） years old，and the age was concentrated between 40 and 50 years. Critical and severe cases accounted for 13.33%（12/90），ordinary and light cases accounted for 86.67%（78/90）；there were no deaths. Conclusion：The COVID-19 population is generally susceptible；the number of cases is concentrated in 40-50 years old，mainly light and ordinary.The prevention and control measures in the western Chongqing area are in place，and the COVID-19 epidemic has entered a low-level epidemic situation. With the resumption of work，resumption of production，and resumption of schooling，population movements and clusters may increase. It is recommended that continuous ef－fective prevention and control，precise prevention and control be implemented，and the epidemic situation rebound.