多数由农村迁往城市的流动人口在初次进入城市之后还要不停地在城市之间、城乡之间流动。流动人口的流动是一个复杂的选择和转变过程，不仅包含工作和居住地点的转换和空间轨迹的刻画，还伴随着生命过程中的个人、家庭社会经济和社会关系的多重变化，其空间流动过程与时间的生命历程紧密联系在一起。以往研究较为关注流出地-流入地“两点式”的流动行为，而忽略了后续的梯次流动过程及伴随期间的个人、家庭及社会关系的演变。本项目以问卷调查的定量分析方法和典型访谈的定性分析方法相结合，把生命历程和空间过程进行耦合分析，研究流动人口时空变化过程中个人、家庭以及社会经济关系的演变，探求其详细的时空规律，以期构建流动人口时空变化过程理论；在此基础上，把最终定居地的选择作为时空变化过程的终点，综合个人、家庭因素和城市特征等环境因素，分析流动人口定居地选择机制。

The migration process is complex, involving initial movement outside a migrant’s place of origin and subsequent movements across different destination cities, referred to as “repeat migration”.The frequent movement of Chinese rural migrants across cities has not drawn enough researchers’ attention. Based on the quantitative analysis of questionnaires and qualitative analysis of interviewing, this project targets on the times course and spatial trajectory of floating population, to analyses the detailed spatial-temporal processed and the change of private, family and social relationship of floating population in the spatial-temporal processes. It aims to put forward a analysis framework and develop a theory of spatial-temporal processes. By tracing back of floating population who have settled permanently and taking the private, family and social relationship in account, this study will put forward the mechanism of settlement selection for floating population.