This　paper　uses　the　method　of　video　cameras　collection　to　gather　the　vehicle,　the　bicycle　and　the　pedestrian　flow＇s　image　material　based　on　the　investigation　of　Beijing＇s　typical　signalized　intersection.　With　the　aid　of　the　simi　software　to　describe　the　time　and　space　distribution　chart　of　mixed　traffic　flow,　the　statistical　method　is　used　to　analyze　variety　of　the　discharged　rate　of　flow.　Integrating　the　studied　intersection＇s　signal　timing　plan,　with　the　form　of　the　space　and　time　distribution　chart,　this　paper　takes　the　traffic　flow　of　vehicles,　bicycles　and　pedestrians　as　the　independent　object　of　study,　describes　the　mixed　traffic　flow＇s　space　and　time　characteristic　and　regulation　of　the　discharged　rate　of　flow　to　thoroughly　further　the　research　of　traffic　flow＇s　characteristics　on　signalized　intersection.　©2009　IEEE.