CFST　Composite　Truss　Girder　Structure　is　composed　of　concrete　top　slab,　CFST　bottom　chord　and　steel　transverse　beam.　This　new　composite　structure　can　make　the　best　material　characteristics,　lighten　the　self　weight,　simplify　construction,　and　reduce　the　project＇s　cost.　At　the　same　time,　it　also　has　good　seismic　performance.　This　paper　discusses　the　structural　system,　the　connection　construction,　the　problems　and　developmental　prospects　of　CFST　composite　truss　girder　structure,　according　to　the　investigation　and　analysis　of　existing　bridges　and　experiments.