From design to construction, the Sidu River Bridge brought unprecedented difficulties and pressure. Unhealthy geological conditions abound, the climate is harsh, the construction is difficult, and there are a series of world-class problems to be solved, which make it possible to open up the site on the steep cliffs, set up more than 1,000 meters of pumping pipes from the bottom of the valley, set up wind speed observation towers on both sides of the canyon, and carry out fatigue tests for 2 million times to ensure that the nodes of the steel truss girders are safe for use, and due to the narrow construction site and transportation difficulties, the construction can only be carried out in the workshop. Due to the small construction site and transportation difficulties, the steel truss girder can only be processed in the workshop and then transported to the construction site to be assembled into segments. A section of more than 80 tons, the heaviest reached 92 tons, each section to use more than 40 rods, more than 4,000 screws assembled and so on, a large number of scientific and technological innovation and technological research, so that they go all the way to "pass through the generals", withstood the unprecedented severe test.