Abstract:  

The conflict between ecological environment protection and urban economic development remain unsettled. It is of great significance for maintaining regional ecological security and guiding the city to develop in an orderly manner to evaluate the importance of ecological land scientifically. The importance of ecological land is not only determined by the ecosystem service function of its own, but is also strongly related to the ecological needs of human beings. The article chose a set of indexes in terms of biodiversity, soil conservation function, water conservation function, outdoor leisure demand and scarcity of ecological land, and build an evaluation model of ecological importance based on both ecosystem services and human needs. We took the downtown area of Changsha as the study area. The results showed that the spatial distribution of ecological lands in Changsha is unbalanced, and the most important ecological lands are mainly composed of forests, important drinking water sources and highquality farmland. They also include large areas of ecological lands that provide ecological barriers and small areas of ecological lands such as wetlands and rivers in the city. Compared with the traditional evaluation models, the proposed model can reflect the influence of human needs and the results are more in line with people’s actual ecological needs.