Abstract: Objective： To investigate the fertility status and desire of married migrants in Beijing， Shanghai and Chengdu， so as to provide groundwork for the future services. Methods： The migrants centralized in factories, building sites and service/entertainment places were recruited in this study. The questionnaire survey including demography characteristics, floating characteristics， reproductive status and fertility desire was conducted by trained investigators. Results： Totally, 4050 married migrants were investigated. The median of children number were 1 (1 to 2)， and the median of expected children number were 2 (1 to 2). The proportions of migrants hoping one child were 47.22%， 61.13%， 41.96%, and 30.38% in those age-groups of <20， 20-29, 30-39, and 40 or higher, respectively. The multi-logistic analysis found that the desired children number in the group of 40 or higher years was higher than that in the <20 age-group （OR=1.98, 95%CI: 1.04-3.77）. Subjects with the no-agriculture registered permanent residence wanted to have fewer children （OR=0.62, 95%CI: 0.52-0.74），when compared with those agriculture registered permanent residence. Moreover， the higher education level， the higher average month income of family they had， the fewer desired children they wanted. The fertility desires of migrants working in the different workplaces were also different. Conclusions： The average number of desired children of migrants worked in Beijing， Shanghai and Chengdu was a little bit higher than that they had， but most of migrants did not expect more than 3 children. Migrants who had higher age， lower education and lower income want to have more desired children.

Key words: Population characteristics, Residential mobility, Family planning, Fertility desire, Workplace