Abstract: With the combination of the index of atmospheric purity (IAP) and the chemical analysis of heavy metals (Mn, Fe, Cu, Cr and Pb) contents in mosses, the air quality in Shenyang City was evaluated. According to the air quality, Shenyang City could be divided into three regions, among which, urban area had a far worse air quality than rural area, and the western urban area was worse than the eastern area, and southern urban area was worse than the northern area. In all the regions, Pbpollution was most serious, and should be taken attention. The results mentioned above were consistent with the air pollution index (API) obtained by monitoring stations.

Key words: Polygonum cuspidatum, Resveratrol, Mineral elements, Meteorological factors, Principal component analysis