The concept of eco-priority was proposed as a guiding principle for tailoring environmental planning to meet requirements of protecting and improving urban ecological functions.

In order to realize sustainable development,eco-priority is held to lead the economic development and eco-environmental protection.

Practical exploration on the ecology first thought in the urban planning;

Based on Ecology First New Town Plan;

Geographically,the strategic position of Nansha is prominent,and has abundant resources for Guangzhou,The development of Nansha will be built under the principle of"ecology first",which aims to satisfy the need of "double-win" of economy and ecology.

Taking protect nature eco-environment as a standpoint,the authors used the concept of ecological priority to analyze the natural endowments of decisive and constructing the eco-networks through research on eco-environment element of the industrial park.

Discussion on forest management thought of “ecology priority”;

Based on the principles of ecology, the paper puts forward six principles of selection of the tree species in urban forest development-plant trees on the sites best suited for them, priority of ecological benefits, meeting bio-goals to forest cultivating, bio-diversity, priority of the arbor species, and priority of local species.

Additionally it explains emphatically the priority of ecological benefits and embodiment of the local characteristics.