Abstract: This topic explores the combination of blockchain technology and urban construction governance. Reconstructing the city cloud data center supported by blockchain technology, blockchain can be applied to various industrial fields such as government affairs, commerce and people's livelihood, getting through the big data management system in every link of urban governance.At the same time, the potential of the big data industry will be to be activated. It is not only consistent with the current state policy of establishing and improving the social credit system in China, but also able to create a highly efficient and transparent government service system. It is a feasible way for the construction of blockchain city. This paper will focus on the reconstruction of blockchain forsomeurban governance scenarios.

Key words: blockchain technology, big data, urban governance