As　a　dynamic　system,　the　road　traffic　system　is　made　of　people,　vehicles,　road　and　traffic　environment　and　any　factor＇s　change　will　affect　system.　The　article　focuses　on　Lian　Huo　Road　of　Xinjiang　and　Qing　Lian　Road　of　Guangdong　of　first　class　highway　and　does　a　comparative　analysis　to　road　traffic　accidents　features　from　the　angle　of　the　accident　form,　the　cause　of　the　accident,　the　accident　vehicle　types.　Finally,　it　gives　the　reasons　of　accident　difference.　©　2010　ASCE.