Abstract:A 1-year field plot experiment was conducted to investigate the irrigation of sewage from marsh gas plant. The results showed that at the same dosages of N, P, K fertilizers both the treatment of sewage only and the treatment of sewage plus chemical fertilizers promoted soil fertility, and the concentrations of soil heavy metals were lower than the criteria of National Soil Quality Standards. However, the long-term effects of marsh gas sewage irrigation on soil quality should be concerned in the future.