Abstract: This paper introduced the effect of acid deposition on forest ecosystems from the following aspects:the effects of acid deposition on element cycling and nutrient imbalance;the effects of acid deposition on the soil physical and chemical properties;the study on the forest water chemistry;the study on the activation of heavy elements affected by acid deposition;the study on the plant growth affected by acid deposition;the joint effects of acid deposition and climate on forests;the effects of simulated acid rain on soil physical and chemical properties and plant growth;the study on the soil weathering;the modeling of problems brought by acid deposition; soil anthropic and natural acidification in the forests; the study on critical charge of acid deposition; the joint effects of acid deposition and other pollutants on plants; and the study on the restoration of acid soil. It also clarified the future study direction and the problems that attention must be paid to.

Key words: Plant polyphenols, Property, Agriculture, Environment, Application