Environmental　monitoring　of　national　highway　is　an　important　content　of　China＇s　environmental　monitoring　network　in　the　transport　field,　a　part　of　national　environmental　monitoring　system,　and　also　a　significant　basis　for　environmental　protection　supervision　and　management　of　the　transport　industry.　Using　the　methods　of　spatial　analysis,　grid　analysis,　and　optimization　through　ArcGIS,　monitoring　objects　of　Chinese　national　highway　environmental　monitoring　network　had　been　screened　out.　Among　which,　the　environmental　quality　monitoring　objects　are　composed　of　the　national　highway　sensitive　sections　nearby　or　passing　through　277　natural　reserves,　32　national　scenic　areas,　7　of　the　world＇s　natural　and　cultural　heritage　sites,　8　important　wetlands,　398　important　reservoirs,　and　193　state-level　sensitive　aquatic　germ　plasm　resources　conservation　areas;　and　the　pollutant　emission　monitoring　objects　include　316　long　and　extra-long　tunnels,　539　service　areas　and　601　toll　stations　with　large　traffic　volume.　Environmental　quality　monitoring　objects　and　pollutant　emission　monitoring　objects　form　China＇s　National　Highway　Environmental　Monitoring　Network,　which　has　filled　the　blank　of　highway　environmental　monitoring　in　the　national　environmental　monitoring　network.　It　will　play　a　positive　role　in　promoting　the　green　development　of　China＇s　transport　industry.