Abstract: In order to solve the problem of surge in lifting cost due to the excessive weight of some precast staircases during the construction of assembled structures, this paper systematically summarizes the existing installation forms of assembled staircases, and puts forward the construction optimization method of them in conjunction with the actual project,The following conclusions can be drawn: when the weight of precast staircase exceeds the crane weight, replacing the staircase form, splitting the staircase panels, upgrading the crane model or changing the crane position can be considered in turn. The staircase panels can be split up and down or left and right according to the actual engineering conditions, lifted and installed separately, and the joint location should be connected by non-expansion grout after installation. Staircase panels should be subjected to strict technical instructions and anti-collision measures in the lifting process. The relevant research results have strong applicability, which can provide reference for the design and construction of precast staircases by assembly building-related practitioners.