Using Jing’an County as an example,this paper puts forward the sustainable management pattern of Chinese Fir for big-diameter timber at the level of management for the first time. Goal trees of Chinese Fir in the forest land with site index 18 are selected and some measures such as reasonable tending thinning and forest fertilization used. Stand density is adjusted continuously to keep 1200 trees per hectare for reaching the goal of producing big-diameter timber. This paper provides some guidance for county-level forest management and improving forest management in collective forest areas in south China.