With the continuous development of Tokyo circle economy，Japan shares the functions of Tokyo as a big city through the construction of sub-capital center and new capital center，and gradually establishes a decentralized network structure of the capital circle，and forms a functional circle to protect green land，farmland，and native nature. In the process of promoting the integrated development of the capital circle，the policy of green development of the capital circle has been established，which is to repair the natural environment，protect the urban parks and green spaces，and build a green capital circle with harmonious coexistence between man and nature. In terms of urban construction，it has reduced urban carbon emissions by building compact cities，developing low-carbon transportation and promoting new energy，and built a multi-core and multi-circle capital circle that is symbiotic with the environment. The green and low-carbon development of the Japanese capital also has important reference significance for promoting the green development of the Beijing-Tianjin-Hebei agglomeration.