The model of sustainable development,such as new eco-demonstration area of Tianxin District,which is a key district of Chang-Zhu-Tan Metropolitan Area,was studied in this paper. The two models of eco-urban and complex system of nature-economic-society of ecological economic,ecological society,ecological environment was set up through eco-demonstmtion city construction of Tianxin Distriet,sustainnable development of society,economic and environment was realized.It's a good case of s...