Abstract: The corticolous arthropods were investigated in a montane moist evergreen broad-leaved forest in Ailao Mountains in central Yunnan in April (dry season), 2013.Arthropods were collected by bark spray at stratified sites at approximately elevation of 2 000,2 200,2 400 m and 2 600 m.The arthropods belonged to 30 groups(order)of 7 classes,including Collembola,Acari,Araneae,Diptera,Hymenoptera,Coleopteran,Psocoptera,Homoptera,and Thysanoptera,et al.The density of all corticolous arthropods increased by the increasing altitudes,while the density of different arthropods groups were changing significantly by different altitudes,but their distribution patterns were inconsistent.The assemblage composition of corticolous arthropods (based on Bray-Curtis similarity) was significantly different among elevational gradients.As a whole,assemblage-level analysis showed that there are no significant associations between the intensity and the tree species or bark roughness,while a few groups still show significant associations.The results showed that corticolous arthropods respond strongly to elevation variation (i.e.changes in temperature and moisture) but not micro-habitats variation such as tree species or bark roughness.