Foliar δ¹³C is an important parameter for researching the adaptive strategy of plants to environment. It was analyzed that the foliar δ¹³C value and it's correlation with foliar trait factors of dominant species in Castanopsis carlessii forests in Lingshishan National Forest Park. Taking the growing situation of Castanopsis carlessii forests and environmental conditions together,nine elevation gradients were divided,which were remarked as A1 to A9 respectively. The dominant species were C. carlessii, Machilus minkweiensi, Schefflera octohylla, Schima superba, Eurya.hebeclados Ling, Enitida Korthals, Castanopsis fabri, Rhododendron simisii Planc, Psychotria rubra, Ardisia quinquegona, Pithecellobium.clypearia, Radix Syzyg buxifolium, Cyclobalanopsis glauca, Rapanea neriifolia, Lindera aggregata, Camellia oleifera, Lithocarpus glabra, Blastus cochinchinensis, Sarcosperma laurinum, Lindera megaphylla, Ilex elmrrilliana, Tricalysia dubia, Camellia octopetala. Results showed that the range of foliar δ¹³C value was between -28.806‰ and -34.399‰ with average of (-30.885±1.205)‰. And foliar δ¹³C was negatively correlated with SLA, content of N, K, Na, Mg, Ash and positively correlated with chlorophyll content of one-year-old leaf,content of Ca,leaf dry matter. There was no significant correlation between foliar δ¹³C and content of Fe and Zn.The foliar δ¹³C was negatively correlated with Mn content of one-year-old leaf, and positively with content of two-year-old leaf. Different δ¹³C in different dominant species reflects change of physiological status in plant. The characteristics of foliar traits of different elevation gradients reflected and affected foliar δ¹³C properties of broad-leaved evergreen forests in Lingshishan.