Qingshui River Bridge is located in the expressway from Guiyang of Guizhou province to Weng’an with a total length of 2171.4m. The main bridge is suspension bridge of single span simply supported steel truss stiffening girder with 1130m main span. The main bridge is over 500 meters high from the deepest canyon，and it is a suspension bridge whose span is the biggest and the most difficult in construction among similar bridges in Guizhou.