The main bridge of Zhongdu River Bridge on the Expressway along the Jinsha River is a concrete cable-stayed bridge with two towers and two cable planes of 148m+320+148m. The main beam adopts double longitudinal rib concrete beam. The cable tower adopts H-shaped cable tower. This paper mainly introduces the design outlines of the bridge, the size of the structure, and the key technologies used in the seismic resistance , the crack prevention in the cable anchorage zone of the tower and bridge health monitoring , so as to provide ideas for the design of similar Bridges in mountainous areas.