Abstract: N deposition has increased significantly with economic development and intensive human activities in China and has affected natural ecosystems in remote areas. To evaluate the atmospheric N deposition of the Bayinbuluk alpine grassland of the central Tianshan Mountains, the dry and wet N depositions were monitored from May 2010 to December 2011. Fluxes of HNO₃, NH₃, NO₂, particulate ammonium and nitrate (pNH₄⁺ and pNO₃^-) averaged at 1.47, 0.68, 0.13, 0.23 and 0.25 kg N·hm^-2·a^-1, respectively. Wet depositions of NH₄⁺-N and NO₃^--N were 2.47 and 1.59 kg N·hm^-2·a^-1, respectively. Total atmospheric inorganic N deposition fluxes averaged at 6.82 kg N·h^-2·a^-1, and the wet and dry depositions were 4.06 and 2.76 kg N·hm^-2·a^-1, respectively. Nitrogen deposition fluxes showed a significant seasonal change, with 72.1% of dry N deposition occurring in spring and summer, and 78.3% of wet N deposition concentrating in summer and autumn.