Long span concrete arch bridges constructed by cable-stayed cantilever cast-in-situ method are widely used in mountainous areas. Because they are not affected by terrain conditions, have reasonable structural forces, and are highly resistant to earthquakes. Reinforced concrete arch bridges with cable-stayed cantilever cast-in-situ method cross-section stress regulation is complex. The top and bottom fibers stress is very easy to exceed the limit or even cracking. So the safety of the construction process also needs advanced monitoring technology and concepts to ensure that this paper, through a number of reinforced concrete arch bridges with cable-stayed cantilever cast-in-situ method. This paper summarizes a whole set of construction monitoring technology based on the control idea of buckling anchor cable tensioned in place at one time, which can provide reference for bridge workers.