Horizontal rotation construction method for steel truss girder bridge

The invention relates to the field of steel truss bridge construction technologies, and discloses a steel truss bridge horizontal rotation construction method which comprises the following steps: S1, lower bearing platform construction: pouring a foundation pile in a foundation pit, and then pouring a lower bearing platform on the foundation pile; s2, lower spherical hinge construction is conducted, specifically, a lower spherical hinge is erected on the lower bearing platform, a sliding way is erected on the peripheral side of the lower spherical hinge, and a pin shaft is arranged at the axis position of the lower spherical hinge in a penetrating mode; s3, upper spherical hinge construction is conducted, specifically, the upper spherical hinge is hoisted and aligned with the pin shaft, then the upper spherical hinge is placed on the lower spherical hinge, and the upper spherical hinge is inserted into the pin shaft; s4, an upper bearing platform is constructed, specifically, a jacking and supporting mechanis