Abstract: Forest Climatic conditions are important factors affecting the high yield of Camellia oleifera. In order to promote the development of C.oleifera production more highly efficiency and normalized and lower energy consumption, 3 years old C.oleifera forest of Mashan Tree Farm which in Li tian village of Jiangxi Province was taken as the test object. Air temperature, relative air humidity, light intensity, topsoil temperature, shallow soil temperature were suveried in C.oleifera forest which was intercropped with sweet potato, soybean, peanut, studying. Intercrops that fit C.oleifera forest most were filtrated by grey correlation analysis method. The results showed that the inter-planting could reduce the forest air temperature as: soybean > sweet potato > peanut > control, increase forest daily average relative humidity as: sweet potato > beans > peanut > control, weak the average light intensity weakened proportional as peanuts > soybean > sweet potato > control. Comprehensive analysis was conducted among different treatments, which were: soybean > Sweet Potato > peanut > control. Therefore, C.oleifera forest which intercropped with sweet potato, soybean improved meteorological environment and ecological environment significantly. It is worth popularizing application during the growth period.