Wood properties of trees ( Populus) selected from healthy and acid rain damaged forest were analyzed to evaluate the possible impacts on wood properties and utilization. Comparing with healthy trees, the contents of lignin and pentosan in diseased trees increased 3.72% and 1.43%, but the contents of cellulose in diseased trees decreased 3.45%. Extractive content showed significant difference between diseased trees and healthy trees. The basic density and air drying density and oven dry density of wood of diseased trees decreased 2.62% and 1.75% and 1.19%. Moisture content in diseased trees was lower than in healthy tree, the difference of moisture content in sapwood was larger and in heart wood was smaller. The tangential shrinkage of wood of diseased trees increased relative 10.77%, the radial shrinkage of wood of diseased trees decreased relative 16.88%. The variation of wood properties by acid rain influenced significantly wood processing and utilization .