Abstract: Objective：To explore the constitution of contraceptives using among married floating people in three cities of China，and its influence factors, so as to provide a data basis for the quality service of reproductive health among the floating population. Methods：A multi-stage cluster sampling were carried out to select subjects from three cities: Beijing，Shanghai and Chengdu. The structured questionaire was used to interview subjects by the trained investigations. Results：6 304 migrants were included in this survey. Among 3938 married subjects with sex，main contraceptives were intrauterine devices（IUD 51.24%），condom（25.16%），sterilisation（17.47%），oral contraceptives（3.63%）and others（2.49%）. Subjects from Chengdu city, with good education background，with non-agricultural accounts，or without childbirth, were prefered to use the reversible contraceptives, such as IUD, condom, oral contraceptives, and so on. Conclusions：The percentage of reversible contraceptives was high. It is necessary to have propaganda and education to the question of condom, oral contraceptives, and emergency contraceptives, in different population.

Key words: Spouses, Residential mobility, Condoms, Contraceptives, oral, Intrauterine devices