An　image　processing　method　of　solving　the　problem　of　the　interference　caused　by　the　edge　features　of　road　markings　lines　when　recognizing　road　boundaries　by　edge　detection　was　proposed.　The　results　detected　by　the　edge　detection　algorithm　were　used　to　process　gray　road　image　line　by　line.　The　gray　values　near　the　point　where　edges　pass　by　the　line　were　determined　and　modified　to　reduce　the　edge　features　of　road　marking　lines　while　retaining　the　edge　features　of　real　boundaries　of　the　road.　Additionally,　a　road　boundary　recognition　system　based　on　edge　detection　was　built　to　test　the　method.　The　validity　and　real-time　performance　of　the　proposed　method　were　verified　by　using　more　than　130　road　images　as　input.　Experimental　results　show　that　the　proposed　method　can　effectively　eliminate　the　interference　of　road　marking　lines　on　road　boundary　detection　techniques　based　on　edge　detection.　©　2021,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.