Atmospheric deposition is one of the important pathways for nitrogen (N) and phosphorus (P) transported into lakes.To understand the potential impact of N and P from atmospheric depositions on the eutrophication of Lake Yangzonghai,this re-search investigated the temporal variation and estimated the fluxes of N and P from atmospheric depositions in the lake catchment.The sources and impact factors of the N and P depositions were analyzed by monitoring data from May 2012 to April 2014.Since Lake Yangzonghai is a P-limited lake,this study especially compared the P fluxes from N and P atmospheric deposition with that from non-point sources,and assessed the potential P-impact from atmospheric deposition on the eutrophication lake.The results showed that the average annual deposition flux of total nitrogen was 248 mg/m²,and seasonal deposition fluxes in spring,summer,autumn and winter were 200,306,274 and 214 mg/m²,respectively.The peak of N flux occurred in summer because of the in-creased rainfall.The annual average P deposition flux was 24 mg/m²,and seasonal deposition fluxes in spring,summer,autumn and winter were 18,31,19 and 27 mg/m²,respectively.Compared with the non-point P-load source,P-input from atmospheric deposition seemed very small,and would have little effect on the eutrophication of the lake.