Badong Yangtze River Highway Bridge is a super large bridge project of National Highway 209 across the Yangtze River in western Hubei Province. Its main bridge is a PC cable-stayed bridge with double cable plane and full floating system with the main span of 388 meters. This paper introduces the main structural design of the main girder of cable-stayed bridge and the stress analysis of the cable-stayed cable. Construction of the bridge began in March 2001 and is scheduled to be completed in June 2004.