Abstract: Natural resistance of 165 timber species (141 hardwood species and 24 softwood species) against termites,Reticulitermes chinensis Snyder,was determined by both laboratory and field tests.Their natural resistance can be arranged as follows: Fokienia hodginsii,Madhuca hainanscnis,Eucalyptus camaldulensis,Cassia siamea,Homalium hainanense,Robinia pseudoacacia,Tectona grandis,Toona sureni,etc.are designated as“no wood damage”. Pinus Kwangtungensis,Acacia auriculaeformis,Averrhoa carambola, Castanopsis hystrix,Castanopsis sclerophylla,Cinnamomum camphora,etc.are designated as“light wood damage”. Larix gmelinii,Pinus koraiensis,Acer davidii,Albizzia chinensis,Albizzia julibrissin,Castanopsis carlesii,etc.are designated as“moderate wood damage”. Picea likiangensis,Pinus Yunnanensis,Ailanthus altissima,Alniphyllum fortunei,Alnus nepalensis,Betula alnoides,etc.are designated as“heavy wood damage”.