Abstract: The research results shows that tolerance of woody-plants to air borne metal pollutants-lead, cadmium, copper and zinc is strong.According to the data from 20 tree species, their leaves in growing season could absorb from atmosphere about 500--800ppm of lead, 120 times. over its background concentration; about 10--18ppm of cadmium, 139 times over the background;about 100--239Ppm of copper, 5--12 times over the background and about 500--700 ppm of zinc, 9--20 times over the background, without serious injure. Under experimental condition, some tree species can probably accumulate 200--600ppm of lead, 20--60ppm of cadmium in leaves without visible symptoms. The acute injury to willow (Salix matsudana) does not occur below 66ppm of cadmium. The injury symptoms of woody-plants leaves caused by heavy metal pollutants in air are typical. The injury symptoms in leaves by lead, cadmium, copper and zinc in air are similar.Therefore, it is an urgent task to use forests and trees for improving the environment and controlling pollution by heavy metals in air.