The main bridge of Hubei Loushui River Bridge is a double hinged asymmetric steel truss arch bridge with a calculated span of 310m, built across the Loushui River Valley. The main arch adopts a steel truss structure, with a box shaped section of equal height for the entire arch rib section. The vertical distance from the centerline of the upper chord to the centerline of the lower chord is 7.5m, and the horizontal distance between the centers of the two arch rib trusses is 27m. It is connected by wind braces, and the entire bridge is divided into two types of wind braces: meter and K-shaped. The bridge deck structure adopts a composite beam system, with steel beams in the form of longitudinal and transverse grid beams, and prefabricated panels using standard components for prefabrication. The bridge deck system is connected to the arch ribs through suspension rods, columns on the arch, with a spacing of 14m between the suspension rods and columns on the arch, and a transverse direction of 27m. The arches on both sides adopt expanded foundations, which are placed on stable and complete moderately weathered rock layers. The arch bridge is designed with double hinged arches, and a hinge axis is set at the arch foot. The maximum allowable angle of the hinge axis surface is ±0.5°. The main arch is constructed using a cable - stayed buckle and cable lifting system. The calculation of the bridge structure using MIDAS Civil shows that all indicators of the bridge meet the requirements of the specifications.