Abstract: Objective To examine the status and influencing factors of the attitude and behavior about having a love affair among senior grade pupils and high school students,and to provide evidences for relevant interventions.Methods In September 2014,a total of 1 920 students from elementary,middle and high schools in a district of Hangzhou city of Zhejiang province were surveyed with a self-administered questionnaire.Results Among the 1785 students with eligible response,the proportion of opposition toward having a love affair was 49.08% and the proportion was lower among senior high school students(26.08%) than among senior grade pupils(58.62%) and junior high school students(62.85%).Of all the students,7.23% reported the experience of having a love affair and there were 17.61% of the senior high school students reporting the experience but 0.69% of senior grade pupils reporting the experience.The results of stepwise multivariate logistic analysis revealed that the risk of having a love affair was higher among high school students than among senior grade pupils and the risk was higher among senior high school students than among junior high school students; the results also showed that the father's education and the attitude towards having a love affair were influencing factors for the students' attitude and behavior about having a love affair.Conclusion The problem of having a love affair among students should be mentioned among senior grade pupils,especially among those with approval or negligent attitude towards the problem.