Abstract: Objective To understand the status of health literacy level and physical exercise frequency among residents aged 18-45 years old in Suzhou City,analyze the influence of health literacy on frequency of physical exercise. Methods The data of residents aged 18-45 years old were collected from the databases of health literacy monitoring in Suzhou City in 2019 and 2020,and the data were analyzed. Results The qualified rate of health literacy among residents aged 18-45 years old in Suzhou City in 2020 was 57.4%,with an increase of 10.4% from 47.0% in 2019（P<0.05）,while the proportion of regular physical exercise decreased by 1.1%. In 2019,the influencing factors of physical exercise among residents aged 18-45 years old in Suzhou City included healthy lifestyle and behavior（OR=1.47,95%CI：1.06-2.04）,health skills（OR=1.58,95%CI：1.14-2.19）,safety and first aid（OR=1.65,95%CI：1.07-2.54）,and health information（OR=1.79,95%CI：1.27-2.54）.In 2020,the influencing factor of physical exercise among residents was scientific outlook on health（OR=0.74,95%CI：0.58-0.94）. Conclusions From 2019-2020,the qualified rate of health literacy among residents in Suzhou City increases,but the frequency of physical exercise decreases.The healthy lifestyle and behavior,health skills,safety and first aid,and health information in health literacy are the influencing factors of residents' physical exercise frequency in 2019,and scientific health outlook is the influencing factor of physical exercise frequency in 2020.It is recommended that we further strengthen publicity and health education to improve residents' health literacy level,provide better physical exercise conditions for residents,continuously strengthen the health concept of national fitness,so as to better build a "Healthy China".

Key words: Health literacy, Physical activity, Suzhou City