Abstract: In this paper, forest campus backbone tree species selections in Northern Fujian were taken as the object of study. The biological and ecological characteristics, ornamental tree species characteristics, ecological function were determined as the main basis for tree species selections, and the climate adaptability, soil adaptability, carbon fixation and oxygen release, cooling and humidifying capacity and other 15 criterion level evaluation indexes were also established,then the Yaahp analytic hierarchy model method was used to establish the campus backbone forest tree species for comprehensive evaluations in order to calculate the weight of each index and tree species evaluation scores. The results showed that the tree species in 50 types' forest campus which had been evaluated were divided into 4 grades. Grade I (> 4), the comprehensive characters performed well, with a total number of 10 tree species; Grade Ⅱ (> 3.7, ≤ 4) had a total number of 14 tree species; Grade Ⅲ (> 3.2, ≤ 3.7) had a total number of 20 tree species; Grade Ⅳ(≤ 3.2) had a total number of 6 tree species. This research result would provide reference of backbone tree species' scientific selections for forest campus in Northern Fujian.