The swing method for a dual-deck curved girder bridge comprises: S1: removing construction loads from a left bridge deck and a right bridge deck, performing a counterweight weighing test, and adjusting the structural center of gravity; S2: synchronously performing trial. The swing method for a dual-deck curved girder bridge comprises: S1: removing construction loads from a left bridge deck and a right bridge deck, performing a counterweight weighing test, and adjusting the structural center of gravity; S2: synchronously performing trial. The present invention relates to the technical field of bridge construction, and provides a swing method for a dual-deck curved girder bridge. Typical components of a swing bridge include a large centre pier and drum which the deck bears upon and some form of pivot point. It has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravity, about which the swing span (turning span) can then pivot. In the free cantilever method of construction the prestressed-concrete superstructure, generally boxlike in section, is cast section by section. When the waterway is. Balanced cantilever construction is suited to precast segmental and cast-in-place bridges. The deck is erected segmentally on each side of the pier in a balanced sequence to minimize load unbalance and longitudinal bending in piers and foundations.