For　traffic　accident　not　only　causes　economic　loss,　but　more　importantly　loss　of　people＇s　lives.　Through　analysis　of　2002-2005　accident　data　of　the　TongZhou　District,　summarized　traffic　safety　issues　of　Beijing.　On　this　basis,　select　the　Beijing-Tianjin　Road,　TongShun　road,　TongMa　road,　as　the　three　most　prominent　road　for　further　analysis.　The　model　of　principal　component　analysis　has　been　used　to　conduct　safety　evaluation　on　the　three　roads,　evaluation　results　showed　that　the　security　situation　of　TongMa　road　as　the　worst.　Combined　with　the　previous　analysis　of　traffic　data,　choose　DaLuDian　district　as　the　final　study　object.　Came　to　the　conclusion　that,　the　safety　programs　will　not　affect　the　normal　operation　of　the　traffic　flow,　what＇s　more,　because　the　cost　of　carrying　out　the　safety　program　is　not　very　high,　it＇s　Appropriate　to　carry　these　measures　out.　©　2011　Chinese　Assoc　of　Automati.