Abstract:Steel temporary bridges are often used as temporary bridges, especially in the process of expressway upgrading and renovation, which can not only ensure the current traffic capacity, but also achieve the rapid installation and demolition, playing an indispensable role in engineering construction. Taking a temporary heavy-load steel bridge in the traffic function improvement project of the S4 Highway entering the city in Shanghai as an example, the original design scheme of the temporary steel bridge is introduced in detail, and the optimization of the design scheme of temporary steel bridge is summarized in order to provide the reference for the design of similar temporary heavy-load steel bridges.