Traffic　signal　control　system　consists　of　different　control　equipments　from　different　manufacturers　and　different　platforms　of　control　software.　The　basic　requirement　of　data-interchange　is　quick,　exact,　integrated　and　safe　during　transmission.　It　is　difficult　to　use　and　share　data　among　different　control　units　because　of　different　communication　interface　standard.　We　should　build　a　uniform　structured　language　to　organize　data.　The　paper　discusses　the　traffic　control　system　based　on　CORBA　and　XML,　and　then　puts　forward　the　distributed　frame　of　traffic　control　system　and　markup　language-SignalML　for　opened　signal　control　data-interchange.　An　effective　method　to　solve　the　problems　of　multi-frame　platform　and　data　exchange　is　put　out.