The　purpose　of　this　paper　is　to　introduce　the　microscopic　traffic　simulation　software　VISSIM　model　and　theoretical　basis.　Based　on　the　intersection＇s　peculiar　forms　of　transportation,　complex　situation　and　the　common　problems,　the　thesis　made　a　thorough　analysis　of　the　investigation　of　the　existing　traffic　condition　and　systematically　introduces　the　plane　junction　single　point　signal　control　timing　design　and　traffic　flow　theory.　The　research　method　in　this　thesis　is　resistance　simulation　carried　out　by　using　software　VISSIM,　and　proved　that　it　can　be　used　for　real　time　detection　and　meets　the　requirements　for　practical　use.　The　research　work　and　the　conclusion　improve　and　optimization　the　traffic　design　scheme.　The　practice　shows　that　traffic　micro-simulation　is　the　effective　way　of　solving　traffic　problems.　At　the　same　time,　traffic　simulation　has　got　wide　applications　along　with　the　development　of　the　computer　technology　and　the　transportation　theories　and　produced　a　good　social　and　economic　benefit.　©　2011　ASCE.