Irrigation River Bridge is a mega bridge on Lianyungang-Yancheng highway, which is located in Yancheng and crosses Irrigation River. The main bridge is a double-surface semi-floating five-span continuous steel and concrete combined girder cable-stayed bridge with a main span of 340m, the main girder adopts bilateral ribs, and the cable tower is H-shaped with parallel stranded cables, and the anchoring of cables in the main girder and the tower adopts the anchor pulling plate and the steel anchored beam, respectively. This bridge is the widest combined girder cable-stayed bridge in China.