Abstract: Since the reform and opening up, the scale of road and bridge projects in my country has continued to expand, and the early bridge projects have gradually entered the maintenance stage. It is neither scientifi c nor practical to dismantle and rebuild most old and dangerous bridges. Therefore, it is of great signifi cance to carry out the reconstruction and expansion of bridge projects. Based on this, this article analyzes and discusses the key points of rebuilding bridge construction technology optimization, in order to provide reference for bridge engineering rebuilding and expansion.