Research Conclusions: In principle the integral span simply supported box girder, prefabrication in girder yard, integral span transportation, bridge position erecting shall be adopted on the whole line, if impossible. It is necessary to perform some special treatment; the steel-box tied arch bridge with a span of 128 m and a rise-span ratio of 1/5.333 is mainly composed of steel box section and steel deck structure. After installed on the bracket, it will be positioned by dragging method. It is shown from static and dynamic analysis as well as fatigue test that such structure design is safe and reasonable; that the structural type of prestressed concrete continuous beam with spans of (80+3*144+80) m is reasonable for navigation; the continuous beam structure, bearing support for earthquake-isolation and reduction, and beam-fixed equipment are adopted for insuring the safety and rationality of the structural design; the measures for the partial flange plate off integral span box girder to be transported by way of tunnel, casting-in situ integral span box girder by overhead launching gantry are effective on settling the issues of integral span box girder transporting and erecting in the dense bridge-tunnel connection section.