Abstract: In order to solve the problems of installation accuracy and efficiency of special-shaped assembled pedestrian bridge canopy, the geometric modeling and meshing were carried out by using BIM+Midas Gen finite element analysis software, the tire frame and hoisting component model were established, the canopy grid was reasonably divided, and the unit with a small arc was divided into separate hoisting, and the in-situ installation in the air was carried out, and the reasonable lifting point layout and precise measurement and control were carried out. The results show that the maximum vertical displacement of the arch truss is 39.68mm, the maximum compressive stress is 92.30N/mm², and the maximum tensile stress is 104.30N/mm² by using a series of measures such as BIM+finite element software analysis, segmentation and section optimization, installation method optimization, and support tire frame layout. The allowable deformation value, maximum compressive stress and tensile stress of the structure meet the requirements of the specification. The installation of the steel structure of the long-span pedestrian bridge can be accurately realized, and the installation efficiency can be significantly improved. The research results can also provide new ideas for the construction of pedestrian bridge canopies with complex structural shapes, long cantilever lengths, large spans, and special-shaped bending and torsional shapes in space.