Abstract: The BIM technology is introduced into the demolition construction of bridges across inland waterway in this project. The field model is established by tilt photography of UAV, and the pipeline model, steel bridge model and old bridge demolition construction model are all created, to carry out the demolition construction process simulation. The application of BIM technology assists to define the stacking site of dismantled components, as well as to adjust the location of floating crane, to fix the anchor point and complete the dredging work in advance. The rationality of construction scheme is further demonstrated, to reduce construction risks and to guarantee the construction safety.