Abstract: Urban ecological park will improve urban greenland landscape,health and stability,form the key areas for biodiversity and natural conservation,supply the demand to get in touch with nature for residents through ecological approaches,such as naturalizing park,developing natural potency,restoring and rehabilitating plant communities with potential vegetation characteristics and introducing wildlife into parks.In this paper,the development,concept,characteristics,function and construction of ecological park were discussed,and the approaches for redeveloping existed parks into ecological parks were also put forward.

Key words: biodiversity, use value, ecosystem function, service value evaluation.