Harmful　gases　such　as　NOx　(NO　and　NO2)　and　N2O　are　emitted　during　the　production　of　dilute　nitric　acid　by　ammonia　oxidation,　which　can　lead　to　environmental　problems　such　as　photochemical　smog　(NOx),　ozone　layer　depletion　(NOx　and　N2O),　and　global　warming　(N2O).　It　is　imperative　to　remove　NOx　and　N2O　from　the　tail　gas　of　nitric　acid　production.　After　introducing　the　generation　pathways　and　control　measures　of　NOx　and　N2O　during　nitric　acid　production,　we　summarized　the　main　technological　routes　for　simultaneous　removal　of　NOx　and　N2O　from　the　tail　gas　according　to　the　research,　development　and　application　situations,　including　one-stage　processes　such　as　simultaneous　SCR　of　NOx　and　N2O,　SCR　of　NOx　and　decomposition　of　N2O　over　a　composite　catalyst,　and　two-stage　processes　such　as　catalytic　N2O　decomposition　followed　by　SCR　of　NOx,　SCR　of　NOx　followed　by　SCR　of　N2O,　and　SCR　of　NOx　followed　by　catalytic　N2O　decomposition.　The　principles　and　characteristics　of　different　technological　routes　were　analyzed.　It　was　pointed　out　that　the　one-stage　processes　face　challenges　of　improving　the　purification　performance　toward　N2O.　The　two-stage　process　of　SCR　of　NOx　followed　by　catalytic　N2O　decomposition,　has　advantages　of　low　consumption　of　reducing　agent　and　high　purification　efficiency　of　N2O.　Further　research　should　focus　on　lowering　the　temperatures　of　both　SCR　of　NOx　and　catalytic　N2O　decomposition　and　improving　the　tolerance　of　catalysts　to　co-existing　gases　(O2,　H2O,　etc.).　©　2023　Chemical　Industry　Press.　All　rights　reserved.