This paper first combs the current situation and problems of the coordinated development of Beijing，Tianjin and Hebei，and then measures the degree of coordinated development by using the coupled degree of coordination model. It is found that the degree of coordination of the coordinated development policies of Beijing，Tianjin and Hebei is still in the primary coordination stage，the degree of coordination of the transportation integration policy is the highest while the degree of coordination of the financial policy is the lowest，and the degree of coordination between the two regions shows differences. The coordinated development of Beijing，Tianjin and Hebei has brought remarkable economic effects to families，which can not only reduce the economic risks of families，but also narrow the gap of economic risks of families. At the same time，it is found that the radiation of the coordinated development of Beijing，Tianjin and Hebei is small，which can only significantly reduce the family economic risks in the core functional areas and some areas around Beijing. Our research conclusions provide the basis for policy improvement for the coordinated development of Beijing，Tianjin and Hebei. Strengthening policy coordination and promoting coordinated development of the financial sector；optimizing spatial distribution and increasing the role of radiation in driving growth；promoting industrial upgrading and relocation and building industrial clusters and relying on scientific and technological innovation and the digital economy；narrowing the gap in regional economic development；promoting the joint construction and sharing of basic public services，and narrowing the gap in household costs.