"National Ecological Security" and Social Economic Development;

However, its backward industrial structure, mass infrastructure construction, national key project construction, and “gradient transfer” projects from the East and abroad have continuously added to its worsening ecological environment, making it difficult for the West to achieve sustainable development and taking on the heavy task of protecting national ecological security.

To ensure the ecological safety in our country,this article sets up a comprehensive evaluation system of national ecological security coupling between ecological district network and ecological safety index network,and makes assessment on regional ecological security index.

This paper outlines for the first time the concept of state special eco-region.

Current problems of exploitation and utilization of water resources in Shenzhen City are analyzed according to the demands for national eco-city and sustainable development.

According to the demand for national eco-district and sustainable development,the authors analyzed the current problems of the exploitation and utilization of water resources in Longgan District,put forward some countermeasures and suggestions for sustainable use of water resources in the end.