中文摘要：

随着城市空间结构的演变发展，居住空间和就业空间逐渐发生错位而产生了严重的职住分离问题，大城市表现更为明显。本文利用北京市第五次和第六次人口普查数据，在传统的昼夜人口密度比基础上．拓展了洛伦兹曲线的应用范围，提出“职住分离洛伦兹曲线”测度方法，从区域层面对北京市职住分离现象进行研究。研究表明，不论从洛伦兹曲线集中指数还是昼夜人口密度比来看，北京市职住分离现象都很突出，昼夜人口密度比存在明显的区域差异，其格局也发生了变化，2000年呈现由核心区向郊区圈层递增的结构，而2010年则出现了明显的东西分化格局。十年间，北京市职住分离洛伦兹曲线集中指数也在相应地增加，洛伦兹曲线方法可以更好地从区域层面来反映职住分离状况。

英文摘要：

With the development of the metropolitan＇ s spatial structure, inhabitancy and employment dislo- cation lead to job separation occurred gradually. According to Beijing＇ s fifth and sixth population census data, using the space Lorentz curve method, combined with population density ratio of day and night from the regional level, we found that whether from the Lorenz curve concentration index or population density ra- tio, Beijing Job-Housing segregation became more pronounced. There are significant regional differences in population density ratio of day and night, and its pattern had changed, in 2000, it was the incremental structure from core to suburbs, in 2010, it appeared a clear pattern which was differentiated between East- ern and Western. Further research shows that Lorenz curve concentration index also had increased. Lorenz curve method can be better to reflect the status of job to live separate from the regional measure.