Abstract: Objective To study the prevalence and risk factors of school violence,and to provide evidence for preventing school violence among middle and elementary school students.Methods A cross-sectional study with self-administered questionnaire was conducted among 1414 students.Descriptive statistic methods were used to analyze the prevalence of violent behavior.Logistic regression models were used to assess possible risk factors of violent behavior.Results Among the students,the incidence of school violence in recent one year was 53.0%.The incidences of psychological violence,physical violence,sexual violence were 36.3%,31.5%,and 5.5%.50.8% of the students experienced school violence.16.7% of students were perpetrators of school violence.The incidence rate for male students perpetrators was 21.7%,while the incidence rate for female students was 11.8%.The risk factors of violence behavior were suffering from violence,exposure to violence event,supporting the violence view,having bad behavior,having a rich family,and male with odds ratios of 5.131,3.425,1.967,1.646,1.376,and 1.499,respectivery.Conclusion Violence among school students in Tangshan is serious.The risk factors of school violence are diversity and effective measure must be taken by the schools and the society.