Considering　the　traffic　organization　project　and　traffic　signal　control　project　of　the　small　and　mediumsized　cities　in　China,　based　on　the　dynamic　optimization　theory　of　operations　research,　this　paper　puts　forwards　the　method　of　optimization　design　between　the　traffic　organization　and　the　traffic　signal　control　of　urban　traffic,　sets　up　the　frame　of　the　dynamic　optimization.　The　whole　design　of　the　dynamic　optimization　is　divided　into　three　stages,　the　first　stage,　based　on　the　original　traffic　organization　project,　the　traffic　signal　control　project　is　optimized,　the　second　stage,　based　on　the　optimized　traffic　signal　control　project　after　the　first　stage,　the　traffic　organization　project　is　optimized,　the　third　stage,　based　on　the　optimized　traffic　organization　project　after　the　second　stage,　the　traffic　signal　control　project　is　optimized　again,　finally　the　best　project　is　got.　This　paper　takes　the　conference　intersection　of　HuaiRou　district　for　example,　gets　the　dynamic　optimization　project　between　the　traffic　organization　and　the　traffic　signal　control,　and　it　is　found　that　this　method　is　better　than　the　past　methods　after　the　analysis　by　computer　simulation.　©　2008　IEEE.