The　Second　Highway　Bridge　over　Yellow　River　in　Zhengzhou　is　located　in　the　national　highway　trunk　linking　the　north　to　the　south　from　Beijing　to　Zhuhai.　In　this　paper,　both　plane　and　space　finite　element　models　are　developed　to　analyze　lateral　distribution　coefficients　of　live　load,　behavior　of　cross　beam,　arch　rib　and　tie　beam,　and　spatial　effect　of　the　structure.　The　elastic　buckling　of　the　bridge　is　also　investigated　by　the　space　finite　element　model.　The　analysis　results　shows　that　the　lateral　distribution　coefficients　of　live　load　calculated　by　the　principle　of　the　lever　distribution　are　almost　equal　to　the　result　from　the　space　FEM,　so　the　principle　of　lever　distribution　can　be　used　in　structural　design;　tie　beam　is　subject　to　considerable　torsion　moment;　the　suspender　crossbeam＇　s　structural　behavior　is　similar　to　simple　beam　while　end　cross　beam　is　influenced　by　tie　beam　and　should　be　analyzed　by　space　FEM;　and　the　lateral　brace　and　supporting　frame　of　tie　beam　contribute　to　stability　prominently.