Objective: To understand the level of public media exposure and mental health status in sudden public health events, and to provide a basis for optimizing the channels of health communication and the content and direction of health education. Method: A cross-sectional study was used to design and distribute a structured self filled electronic questionnaire. Information on public media exposure, health behavior cognition, and mental health status of Chinese citizens aged ≥ 18 years old was collected online from January 31 to February 2, 2020. apply χ 2 tests and logistic regression were used for statistical analysis. A total of 4827 valid questionnaires were collected, with males accounting for 32.3% and those currently residing in Hubei accounting for 2.7%. The age range was 18-85 years old, with an average of (32.32 ± 9.98) years old. 38.4% and 22.7% of the media exposed to epidemic information for more than 3 hours and less than 1 hour per day, respectively. The proportion of anxiety is 53.3%, the proportion of severe anxiety is 9.6%, and the proportion of depression is 48.3%. The higher the media exposure, the more comprehensive the preventive measures are( ρ= 0.091, P Conclusion: Media exposure can affect the public's mental health, increase the risk of anxiety and depression. While preventing and controlling the epidemic, attention should be paid to counseling the public's mental health.