Road　markings,　as　one　of　the　important　traffic　ancillary　facilities,　play　a　significant　role　in　traffic　safety.　The　installation　of　road　markings　inevitably　requires　a　large　amount　of　marking　paint.　However,　the　visibility　and　durability　of　current　road　marking　paints　are　unable　to　meet　the　requirements　of　the　modern　development　of　the　transportation　industry.　Since　road　marking　construction　units　only　focus　on　whether　the　initial　performance　of　the　marking　paint　meets　the　requirements,　without　considering　the　mechanism　of　the　paint＇s　performance　changes　during　use,　the　visibility　and　durability　of　the　markings　decrease　rapidly　after　a　period.　In　this　context,　based　on　the　optimal　formulation　scheme　of　the　marking　paint,　this　study　prepares　paint　samples,　designs　a　marking　wear　test,　and　combines　Scanning　electron　microscope　(SEM)　analysis　to　investigate　the　reasons　for　the　decline　in　the　wear　resistance　and　luminance　factor　of　the　marking　paint.　By　observing　the　microscopic　morphology　of　the　surface　of　the　marking　paint　samples　at　different　wear　stages,　it　is　concluded　that　the　quality　of　glass　beads　themselves　and　the　adhesion　between　glass　beads　and　surrounding　fillers　are　the　main　causes　of　marking　paint　failure.　The　obtained　failure　mechanism　provides　corresponding　experimental　plans　and　results　for　further　development　of　high-performance　coatings.　©　2024　The　Authors.