Abstract: Objective To understand the trend of knowledge and behavior changes in healthy lifestyle among residents aged 15 and above in Pengzhou City,scientifically evaluate the implementation effect of the national healthy lifestyle action,and provide a basis for further action. Methods The Sichuan Province national health lifestyle action evaluation questionnaire was used,and 400 people were selected through multi-stage stratified random sampling in Pengzhou City from 2018 to 2022 to complete the survey. A total of 2 000 valid questionnaires were collected. The promotion points,lecture sessions,distribution of promotional materials,and number of recipients of education for the national health lifestyle action and major chronic disease theme promotion activities from 2018 to 2022 were statistically analyzed. Results The awareness rate of the national health lifestyle action,the awareness rate of related health knowledge,and the formation rate of healthy lifestyle behaviors were statistically analyzed,totaling 22 indicators. Among them,the knowledge awareness rate and behavior formation rate of 19 indicators showed an upward trend （all P<0.05）.In terms of knowledge awareness,there had been a significant increase in "risk of diseases associated with smoking" （growth rate of 285.71%）,"awareness of the 'three reductions and three enhancements' content"（growth rate of 135.71%）,and "awareness of the national healthy lifestyle campaign"（growth rate of 117.39%）. In terms of behavior formation rate,there had been a significant increase in "frequent/every use of oil control pots"（growth rate of 700.00%）,"an increase in weekly exercise frequency compared to 1 year ago"（growth rate of 144.44%）,and "conscious control of body mass"（growth rate of 96.00%）. Conclusion From 2018 to 2022,the implementation of the national healthy lifestyle program in Pengzhou City has achieved significant results.Although there have been fluctuations in the awareness and behavior formation of the national health lifestyle action and related health knowledge,the overall trend is upward. The grasp of knowledge on reducing salt,oil,healthy waist circumference,and healthy body mass is not ideal,and the use of health support tools is also low. Considering the actual situation in Pengzhou City,investment in on-site education activities should be strengthened.

Key words: National healthy lifestyle action, Effectiveness evaluation, Resident, Awareness, Health education