Abstract: Mountains are an important part of human and nature community,and also important land and spatial resources.Mountains have multiple functions for urban ecosystems.This paper reviews the economic driving force and social needs for Sanya City mountain conservation legislation.Sanya's tourism flourishes the city's wealth but degrades the urban natural environment by taking mountainous land and space to real estates and irrational mining activities in mountains.At present,national resources legislation in our country based on environmental factors such as water,forest,land and mineral resources are lacking the holistic concept and the pertinence of law enforcement for mountains.Therefore,the Regulations of Sanya City for Mountains Conservation was promulgated in 2016.The Regulations uphold the legislation principles that resources development and use of mountainous space should be coordinated with the mountainous conservation plan.It establishes unified procedures for planning and decision-making,and administrative supervision for mountain resources conservation.The Regulations also provide references for other cities and districts in China to cope with the same or similar challenges in balancing the conflict of mountains conservation and urban economic growth in order to achieve urban ecologically sustainable development.

Key words: Xi Jinping's Ecological Ideas of Ruling by Law, mountainresources, urban ecological systems, legal mechanisms