Dagu Channel Bridge of Qingdao Haiwan Bridge is a 4-span continuous single-pylon self-anchored steel box girder & suspension bridge with the span of 260 metres; its total length is 610 metres; the main span and side spans are of suspension structure. The stiffening girder adopts separated 2-box section; the two separated steel box girders are connected with transverse connecting box transversely; the total width of the stiffening girder is 47 metres; the standard girder is 3.6 metres high; in the main cable anchorage zone, integral box girder is adopted.