As a major greenhouse gas, ozone could cause visible foliar injury, stem shortened or even brachysm for plants. It could induce lipid peroxidation, damage chloroplasts, destroy photosynthetic pigments in plant cells, and give rise to stomata closure of leaves. By restraining carbon assimilation, weakening the net photosynthesis of plants, it could ultimately lead to the decline of plant growth and output reduction in seeds and crops. The effects of ozone stress on plant growth are not only different from ozone concentration and species to species, but also relevant to the growth stage of plants, and what's more, the competition among different plants could impact their sensitivities to ozone stress. Chronic ozone stress could lead to carbon allocation change among branches, leaves and roots. As a result, to reinforce studies on ozone effects on forests in natural environments, to locate researches about plant responses to ozone under different environmental conditions, and to conduct researches on interaction between global climate change and ozone on plants would be the hot spots for future researches between ozone and plants.