Love and Marriage behavior of Beijing youth is an important and complex social，psychological and cultural phenomenon，reflecting social development and great changes. This study adopts questionnaire-investigating means to probe into the Beijing Youth characteristics of Love and Marriage behavior，and explores love and marriage behavior of Beijing Youth in gender，age，level of education and differences in different levels. To further explore the association between marriage behavior of Beijing Youth and psychological stress in order to provide scientific basis for increase relationship satisfaction，the mental health of young people，and the development of love and marriage education in Beijing. The results show that marriage status of youth in Beijing is mainly affected by marriage values，emotions，sexuality，communication，economic conditions，the coexistence of six impact factors. Stress mainly comes from emotion，family economic status，the coexistence between the sexes.