Research conclusions ； The deck arch bridge is suitable for crossing the mountain river and deep valley. Based on studying the design of deck steel tube concrete arch bridge, the following results are offered ： (1) The calculation results of the effect of type section of the arch rib，the crossing incline angle of arch rib，the architecture above the arch，span of the main girder, bearing arrangement method for the pier top and related parameter on the jointless track and dynamics of train，track and bridge； (2) The results of the effect of the span ratio and parameters of the arch axis, erecting method of the steel tube，the sequence of concrete casting in the steel tube on the stress of the arch rib ； (3 ) A new design concept and thoughts.