Abstract: Winter and spring season is the peak period of forest fire in Beijing. In order to select appropriate tree species to build biological fire prevention forest, prevent forest fire spreading, reduce the loss of forest fire, fire resistance of five common conifer in Beijing was studied. The moisture content, bark thickness, ratio of leaf surface area to volume, leaf burning point, leaf calorific value and leaf coarse ash content of the barks and leaves of different coniferous trees were measured. Factor analysis was used to comprehensively evaluate and sort the fire resistance of the tree species. Through the analysis of 7 fire resistance univariate factors of different tree species, the comprehensive order of fire resistance of 5 tree species is: Juniperus Formosana Hayata＞Pinus Bungeana Zucc＞Pinus TabuliformisCarr＞Juniperus Chinensis Linnaeus＞Platycladus Orientalis(L.) Franco.

Key words: coniferous species, fireproof forest belt, fire resistance, factor analysis