Drawing on the government statistical data and sampling survey data，this report analyzes the characteristics，trends and causes of marriage and childbearing changes in Shanghai in recent decades. We find that Shanghai young people’s mean age at first marriage is increasing，and late marriage has become a general trend；marriage is still the choice for the vast majority of people，and there is no sign of single wave；young people are postponing parenthood，while childlessness is seen as the ideal general fertility option for only a small minority；the divorce rate continues to rise，but the overall level is not in the top of China；the values of personal happiness are generally accepted and the concept of marriage cannot be divorced is reducing. Finally，the article puts forward some suggestions for promoting the service of marriage and childbearing in Shanghai.