With the in-depth implementation of China"s transportation power strategy, the construction of large-span bridge projects has ushered in a new stage of high-quality development. In order to further enhance the construction technology of large-span bridges and accelerate the intelligent transformation of engineering construction, this paper systematically summarizes the latest research progress in the three major technical fields of investigation, design and construction in China in recent years. In terms of geological survey: traditional drilling, physical exploration and comprehensive physical exploration method are further developed into a comprehensive survey technology system and realized large-scale engineering application; the introduction of intelligent means such as drone aerial survey and BIM technology significantly improves the survey efficiency and safety. In terms of design technology: reliability design theory, bridge design under multi-hazard coupling, seismic and wind-resistant design and other new theories and methods continue to improve; cable-stayed, suspension and cable-stayed-suspension collaborative system and other structural forms have been widely used to Zhang Jinggao Yangtze River Bridge as a representative of a number of major projects made breakthroughs in the innovation of the key structural system, creating a number of world records; based on the deep learning algorithm of the Artificial intelligence design technology based on deep learning algorithms has made important progress in practical engineering applications. In terms of construction technology: for deep-water foundation construction, the company successfully researched and developed a fully hydraulic power head rotary drilling rig, and innovatively adopted new types of foundation forms, such as step-type sinkhole foundation, embedded set-up sinkhole foundation, and super-large-diameter bored piles, etc.; for cable-stayed tower construction, the company adopted the fully enclosed wind-resistant hydraulic climbing mold technology, put forward the intelligently-controlled hydraulic climbing and lifting machine, and researched and developed the intelligent control system; for the construction of steel truss girders and steel box girders, it put forward a new type of jacking construction process, and the overall control system for the construction. For the construction of steel truss girder and steel box girder, it proposes a new type of jacking construction process, overall manufacturing and erection process, and develops automatic assembly system and robot welding technology. However, there are still several pressing issues in the current research on intelligent construction technology that require urgent resolution. In the future, research should further focus on the directions of intelligent investigation, bridge design based on artificial intelligence technology, intelligent construction equipment and automated construction technology, so as to promote the development of large-span bridge engineering construction technology in the direction of more efficient, more intelligent and safer.