Abstract: In this Paper, guided by the code for master plan of national forest parks (LY/T 2005-2012),analysis was made of the purpose,principle and types of function division of forest parks. Furthermore,taking Jiajinshan National Forest Park (part in Sichuan Baoxing County) as an example,this park was divided into core landscape area,general recreation area,management and service area,and ecological conservation area. This function division not only laid a solid foundation for the rational planning of Jiajinshan National Forest Park,but also could provide a reference for other forest parks.