Globally, large increases in anthropogenic emissions of reactive nitrogen because of energy and agricultural development and rapid urban growth have led to the terrestrial and aquatic ecosystem nitrogen deposition. Approximately 55% of the artificially fixed nitrogen is redistributed back to the atmosphere as NO_X and NH₃. Excessive nitrogen deposition has caused negative impacts on ecosystem health and services, such as water body deterioration, biodiversity loss, soil degradation, stratospheric ozone reduction and increased susceptibility to secondary stresses. Danjiangkou reservoir is a gorge-type reservoir and forms a total 1050 km² reservoir area. The reservoir plays a central role in the drinking water source of the South-North Water Transfer Project, which is designed to relieve the water shortage and support sustainable social and economic development in northern China. Hence, both government and public have been increasingly concerned of the water quality of the reservoir. Atmospheric nitrogen deposition is an important pathway for the exogenous nitrogen input to reservoir, except for the loading of rivers into reservoir. However, until now, less attention has been paid on the flues of nitrogen deposition in the large scale reservoir. This study aimed to discuss the spatiotemporal distribution characteristics of nitrogen wet deposition and quantify its contribution to total nitrogen loads for Danjiangkou reservoir. The Xichuan area of Danjiangkou reservoir was selected as the study area, and the wet deposition samples of atmospheric nitrogen were collected and analyzed at the six sites around the reservoir from November 2018 to October 2019. The results showed that the fluxes of nitrogen wet deposition was 24.21 kg hm^-2 a^-1 in the study area, and the fluxes were in the following order:ammonia nitrogen (47.45%) > organic nitrogen (36.34%) > nitrate nitrogen (16.21%). Nitrate wet deposition fluxes showed significant difference in the space. The wet deposition fluxes of ammonia nitrogen and organic nitrogen exhibited significant difference among four seasons. The wet deposition fluxes of ammonia nitrogen were in the following order:summer > autumn > spring > winter, while the order of organic nitrogen fluxes was autumn > summer > spring > winter. There were significant positive correlations among the wet deposition fluxes of ammonia nitrogen, nitrate nitrogen and organic nitrogen, and so were the correlations between the wet deposition fluxes of ammonia nitrogen and organic nitrogen and precipitation. The wet deposition fluxes of total nitrogen and ammonia nitrogen were 1321.98 t/a and 627.34 t/a, respectively, which accounted for 10.82% and 34.85% of the loading of rivers into the reservoir. The results of this study can provide the important theoretical basis of controlling pathway for nitrogen pollution in the reservoir.