At present，China's investment in the construction of smart cities is increasing，and various kinds of platform software emerge in an endless stream，but a variety of problems also emerge. How to completely eliminate the information isolated island and form a real information interconnection and interoperability still needs further study.Against this background，this paper analyses the current situation of smart city construction，introduces the concept of micro-service design，gives the implementation method of micro-service application in software platform construction，and finally discusses the advantages and disadvantages of micro-service.