Acceleration　of　the　urbanization　process　and　sustained　development　of　the　economy　have　brought　tremendous　pressure　on　today＇s　road　transportation　system.　The　road　capacity　of　cities　has　not　been　able　to　meet　the　increasing　traffic　demand.　In　order　to　solve　the　problem　of　urban　traffic　congestion,　the　study　of　the　impact　of　community　opening　on　the　surrounding　road　traffic　flow　has　a　profound　impact　on　the　solution　of　this　problem　and　the　significance　of　the　research.　In　this　paper,　the　traffic　flow　evaluation　system　is　established　using　the　analytic　hierarchy　process　to　analyze　the　changes　of　surrounding　road　traffic　flow　before　and　after　the　opening　of　the　community.　The　circle　extrapolation　method　is　used　to　redistribute　the　surrounding　road　traffic　flow　after　opening.　Through　the　systematic　analysis　of　the　evaluation　system,　it　is　concluded　that　the　opening　of　the　community　has　a　positive　mitigation　effect　on　the　surrounding　road　traffic　flow.