Abstract: Objective Based on the investigation of adolescent health knowledge,attitude,behavior and the access to adolescent health information of senior primary school students in Minhang District of Shanghai City,to analyze and evaluate the effect and satisfaction of new media health intervention in adolescent health,and improve the intervention strategy. Methods By the randomized cluster control trial,the new media was adopted to investigate and intervene all the students in the selected class from September 2021 to December 2021. Totally 1 354 senior primary school students from four primary schools in Minhang District were selected for investigation and intervention. Results In this study,a total of 1 354 adolescents in Minhang District were investigated,and 1 314 valid questionnaires were collected,with an effective rate of 97.05%. After adolescent health intervention through the new media,the median of overall score of health knowledge in the intervention group（9 points） was significantly higher than that in the control group（7 points）（full score of 10 points）,and the difference was statistically significant（Z=-18.148,P<0.01）. The qualified rate of health knowledge in the intervention group（97.89%） was significantly higher than that in the control group（74.00%）（χ²=156.406,P<0.01）. The proportions of correct attitudes and behaviors in the intervention group were significantly higher than those in the control group（all P<0.01）. The top three access ways were social media（64.00%）,parent-child communication（59.89%）,doctors and experts（58.98%）. There was statistically significant difference in ways to obtain network resources between the two groups（χ²=12.715,P<0.01）. 86.60% of the respondents were satisfied with the new media health intervention,and the difference between boys and girls was statistically significant（χ²=4.525,P<0.05）. Conclusions The new media adolescent health intervention applied to adolescents in Minhang District is feasible and effective,and female adolescents are more satisfied with this new media adolescent health intervention than male adolescents. It is suggested that relevant departments should make full use of the combination of parent-child communication and online media,and provide scientific,practical and high-quality professional health communication knowledge for teenagers in the information age in many ways,so as to steadily improve their health level.

Key words: New media, Adolescents, Adolescence, Health intervention