Beijing，as the capital of our country，is attractive for the floating population. With economic development and urbanization process forward，the floating population is increasing faster，at the same time，there is a growing trend of family Migration. This paper focus on the situation of immigrant family of floating Population in Beijing，analysis of main difficulties they faces. Now，the Integration of Beijing-Tianjin-Hebei regions offers opportunities and challenges to the government and the immigrant family of floating Population，the paper try to provide some advice to achieve a win-win situation.