Abstract: Objective To investigate the prevalent characteristics of health risk behaviors among adolescents in Yunfu,and to provide a reference for making comprehensive intervention measures of major health risk behaviors.Methods Muhi-stage stratified cluster random sampling method was adopted to select a total of 2 666 students which were surveyed with questionnaires of health risk behaviors.Results The incidence rates of junior high school students about bike violations,fighting,intentionally hurt themselves which was 45.79%,16.85%,10.65%,respectively,were higher than those of the high school students.And the incidence rates of having no breakfast,lack of exercise time,unsafe swimming,present smoking and drinking,addiction into video game,gambling among vocational school students,which were 47.87%,57.38%,12.79%,15.41%,42.79%,23.11%,25.57%,were higher than those of other school students.About 10.39% of students had no health risk behaviors.The proportion of vocational school students with four or more dangerous behaviors(35.74%) was higher than that of other students.Compared with people with one kind of health risk behavior,boys with four or more dangerous behaviors had the highest risk of fights(OR=65.01),and girls had the highest risk of Internet addiction(OR=77.54).Conclusion The health risk behaviors of adolescents in Yunfu are frequent and prominent.Therefore,targeted health promotion activities should be carried out and health guidance should be strengthened.