Urban green infrastructure is an effective way to solve many environmental issues caused by urbanization. As urban soils are generally not suitable for vegetation growth, a lot of soil resources needed for urban green infrastructure construction can only be excavated and transported from the exurban farmland and/or natural topsoil to urban areas, or in another way, urban soils are planted vegetation after fertilized with organic waste. These methods tend to be costly, destructive to arable land, induce large carbon emissions, and/or have a high cumulative risk of pollution. The huge amount of soil resources needed for the construction of urban green infrastructure is very scarce and this has to be addressed urgently. Constructed Technosols (CT) is a new soil created by using organic and inorganic solid wastes (including artefacts and also seminatural sediment and excavated deep soil-like things) for growing plants, which can be adjusted to meet the requirements of various vegetation types, land uses, site conditions (roof, balcony, street, etc.) in physicochemical properties and pollutant limit standards, and finally returned to the city for green infrastructure construction. CT can simultaneously alleviate the pressure of disposal of urban solid waste and solve the issue of soil shortage in urban green infrastructure construction. It features low carbon, low cost and low eco-impact, and can also produce economic benefits. In this paper, firstly, it was briefly stated the definition, classification and construction techniques of CT. And, the research status and advances mainly in terms of roles in plant growth, carbon capture, biodiversity protection, runoff pollutant removal, and artificial biological intervention of CT were presented. Then, it was briefly described the production of solid waste in China, and according to the current research and application situation, it was proposed the application potential (such as ornamental plant breeding and cultivation, sod production and urban farming etc. in addition to the park, green buffers, green roof and brownfield remediation like things) and advantages of CT. Finally, based on comprehensive research progress, some problems in CT research were pointed out and some insights and suggestions were put forward. Meaningful research on the ecological risk of pollutants in CT, biochar (hydrochar or pyrochar) application to CT, soil heterogeneity design for plant diversity, biological regulation of CT good for human health, promotion of environmental function for CT, and role of carbon sequestration by CT were proposed and supposed. It was aimed that comprehensive reutilization of urban solid waste and more eco-friendly low-carbon development of urban green infrastructure will be able to be promoted, urban carbon sequestration will increase, and urban ecological environment and people's health and well-being will be improved.