Urban ecosystem is a kind of complex social-economic-natural ecosystem. The essence of urban ecosystem restoration is to coordinate the relationship among the natural process, economic process and social process of the urban complex ecosystem, and promote the coordinated and efficient development of all aspects of the complex ecosystem. This paper takes urban green space, urban wetland, urban wasteland, three main types of urban ecological space, as the objects, and discusses the research progress of urban ecosystem restoration. Then we point out that the current urban ecosystem restoration has some questions such as too much artificial restoration and lacking of natural restoration, the lack of mechanism and quantitative research, the disconnection between theory and application, the imperfect management mechanism, and the weakness of complex ecosystem theory application, and so on. This article reviews the current research hotspots of urban ecosystem restoration, including restoration mechanism of urban ecosystem, urban ecological asset and ecosystem services, urban ecosystem quality and health, ecological restoration resulted from urban problems, ecological restoration oriented to human welfare, multidisciplinary integration of ecological restoration, and application of new methods and technologies. Finally, the paper puts forward the relevant countermeasures and suggestions of urban ecological restoration and management, which can provide references for the research and practice of urban ecosystem restoration in China.