The　Community　Multiscale　Air　Quality　(CMAQ)　modeling　system　was　applied　to　simulate　the　atmospheric　nitrogen　(N)　deposition　in　China　during　2010.　The　budget　of　N　deposition　for　China　was　7.6×103　Gg　in　2010,　which　was　dominated　by　deposition　of　reduced　nitrogen　(accounting　for　2/3).　N　deposition　was　highest　in　summer　and　lowest　in　winter.　Dry　deposition　was　the　predominant　form　of　N　deposition　(accounting　for　62%),　mainly　contributed　by　the　gaseous　nitrogen　pollutants,　while　wet　deposition　was　mainly　attributed　to　particulate　ammonium　and　nitrate.　The　N　deposition　varied　greatly　in　space,　with　high　values　in　the　east　and　low　in　the　west.　Specifically,　high　N　deposition　was　found　in　the　North　China　Plain,　the　Sichuan　Basin,　southern　central　of　Central　China,　Guangdong　and　Guangxi,　and　parts　of　the　Northeast.　Thus,　reduction　of　N　deposition　in　China　would　depend　on　the　control　of　emissions　of　ammonia,　as　well　as　those　of　nitrogen　oxide　in　the　developed　eastern　coastal　areas.