Ozone is a kind of secondary pollutant with high oxidability and strong biohazard. Long-term monitoring shows that the ozone concentration in Beijing exurban region is obviously higher than that of the urban and the suburb regions. The value of AOT40, from May to September reached 98.9mg/m³, which might already have negative influence on the growth of the wild plants. Via investigation near the long-term monitoring spot sited in Mangshan Forest Park, and referring to the assessment standard of visible symptoms of ozone injury which comes from investigation and imitation experiment of other countries, we found that 15 ozone-sensitive species with obvious ozone foliar injury symptoms among 26 woody plants,including arbor and shrubs, These 15 plants species include Grewia biloba var. parviflora, Lespedeza floribunda, Lespedeza tomentosa, Cotinus coggygria var. pubescens, Rhus typhina, Caragana frutex, Vitex negundo var. heterophylla, Prunus davidiana, Prunus sibirica, Ampelopsis humulifolia, Prunus triloba, Juglans mandshurica, Quercus wutaishanica, Rubus crataegifolius, Spiraea trilobata. The typical symptoms of the ozone foliar injury are dark stipple, mottling and tip burn. The colors of the injury symptoms changed from light to deep, including white, gray, yellow, brown and tan, the latter three were more usual. It showed that the woody plants in Beijing exurban region, including arbor and shrubs, had already suffered the hazard of ambient ozone. Besides, the other 11 woody plant species, including Pinus bungeana, Platycladus orientalis, Koelreuteria paniculata, Morus alba, Broussonetia papyrifera, Ziziphus jujuba var. spinosa, Pinus pumila, Pinus tabulaeformis, Ulmus pumila, Corylus mandshurica, Populus davidiana, showed similar symptoms of the previous plants. But further research is still necessary to investigate the factors lead to the injury symptoms.