The present experiment was carried out to investigate spatio\|temporal changes in wet deposition of nitrogen from atmosphere in Chongqing area. Rainfall in successive three years was collected from three test sites, including a forestry site and two urban sites near and far from city, and analyzed for variable nitrogen concentrations. Total nitrogen (TN) in rainfall ranged from (3.94±0.50) mg L-1 to (4.56±1.01) mg L-1，averaged (4.27±0.73) mg L-1. NH+4\|N accounted for 44.9%, NO-3\|N for 27.4% and DON (dissolved organic nitrogen) for 27.5% of TN in rainfall, respectively, indicating largest contribution of NH+4\|N to wet deposition of nitrogen from atmosphere. The concentrations of nitrogen in rainfall varied seasonally, i.e. winter > summer > spring and autumn. Nitrogen deposition in rainfall tended to decrease from the urban area near the city to forestry site far from city. TN concentrations in rainfall were 4.56 mg L-1 (urban area near the city), 4.32 mg L-1(urban area far from city) and 3.94 mg L-1 (forestry area), respectively. Even though there were no correlations between nitrogen concentrations (NH+4\|N、NO-3\|N、DON and TN) in rainfall and the amount of precipitation, wet deposition of nitrogen from atmosphere were positively correlated to the amount of rainfall. The amount of nitrogen deposition from rainfall in Chongqing, which was higher than critical index of nitrogen load in water and probably harmful to water resources in Three Gorge′s Area, varied spatio\|temporally due to ground nitrogen emission and the amount of rainfall.