Objective: This study conducted a tobacco control intervention practice on vocational school students based on social cognitive theory, for exploring the practical and feasible tobacco control strategies among students, so as to reduce adolescents’ smoking behaviors. Methods: Cluster random sampling method was used to select students in four vocational schools in Shanghai, which were randomly divided into the intervention group (2 schools 1 003 students) and the control group (2 schools 1 096 students). The intervention was conducted on the intervention group based on the social cognitive theory and lasted for 6 months. The control group was blank. Descriptive and analytical statistical methods were used to evaluate the effect of intervention. Results: After the intervention, in the intervention group, the current smoking rate (2.77%) and the smoking intention in the next 1 year (8.50%) both decreased, the scores of the cognition of the harm of smoking as well as second hand smoking and the attitudes towards tobacco all increased(39.04%, 32.93%), the self-efficacy of refusing smoking increased (88.93%), the social pressure decreased(12.40%), the exposure rate of secondhand smoke in family decreased(35.45%), and the exposure to tobacco control message on media increased (36.68%). The difference was statistical significant compared to the control group (χ2=8.67，19.32，17.87，8.32，13.51，14.71，17.36，20.09，P<0.01). Conclusion The tobacco control model based on social cognitive theory could effectively improve adolescents’ self-efficacy, increase their tobacco-related knowledge, and significantly reduce their future smoking intention and behavior.