In　order　to　meet　the　construction　requirements　of　Long-tan　River　arch　bridge,　we　prepared　the　self-compacting　expensive　C50　concrete　that　possesses　good　workability,　high　strength,　high　early　strength　and　expansive　properties.　The　self-strains　of　steel　tube　caused　by　the　core　concrete　expansion　and　the　maximum　load　bearing　capacity　of　steel　tube　filled　with　self-compacting　expensive　concrete　were　all　studied.　The　experimental　results　show　that　the　core　concrete　is　under　three-dimensional　suppressed,　and　the　bearing　capacity　of　steel　tube　filled　with　expansive　concrete　is　about　7%　more　than　that　of　common　concrete　filled　steel　tube.　The　construction　application　effect　was　good.