Forty　one　reinforced　concrete　truss　arch　bridges　have　been　erected　in　China　over　past　decades,　with　the　longest　span　of　330　meters.　In　order　to　design　longer　span　of　arch　bridge　than　the　former,　a　new　type　of　structural　system　deck　type　concrete　filled　steel　tube　arch　bridge　combined　with　cable　(Chinese　invention　patent)　is　put　forward　on　the　basis　of　successful　engineering　practice　on　past　forty　one　reinforced　concrete　truss　arch　bridges.　Taking　a　deck　type　arch　bridge　combined　with　diagonal　cable　with　main　span　of　172　meters　as　an　example,　the　Tianzhishan　Bridge,　located　in　Hunan　Province.　The　differences　are　introduced　between　deck　type　concrete　filled　steel　tube　arch　bridge　combined　with　cable　and　reinforced　concrete　truss　arch　bridge.　The　main　arch　ribs　are　made　of　cast-in-place　concrete　filled　steel　tube　instead　of　reinforced　concrete　box　component;　and　the　diagonal　tensile　members　are　made　of　flexible　cable　instead　of　rigid　tensile　element.　There　is　no　need　to　add　additional　temporary　cable　during　construction.　The　axial　force　and　deformation　of　permanent　cable　is　adjusted　according　to　vertical　displacement　of　main　arch,　so　the　engineering　control　on　internal　force　and　displacement　of　main　arch　is　carried　out　easily.　The　vertical　stiffness　of　main　arch　is　enhanced　by　the　cable,　then　the　vertical　deformation　of　main　arch　decreases　and　the　spatial　stability　of　the　arch　bridge　becomes　better.　Furthermore,　investigation　on　the　structure　scheme　has　been　made　for　the　purpose　of　working　out　extra　long　span　arch　bridge.