Abstract: To address the challenges related to reinforced concrete struts in underground station deep foundation pit engineering, such as the construction difficulties, nonreusability, and limited economic and social benefits, the loadbearing mechanism and construction characteristics of such support structures should be studied indepth. Method: A new prefabricated double Hshaped steel strut (abbreviated as DHSS) suitable for metro station projects is proposed, and a design analysis of its crosssection and connection nodes is presented. A finite element (FE) model of the prefabricated DHSS and its joint nodes is developed using ABAQUS software to analyze its axial compression performance and bending behavior at the joint nodes. The economic and social benefits of DHSS are analyzed.Result & Conclusion: The new prefabricated DHSS along with its connection nodes, meets current specifications and practical engineering requirements. It has been successfully applied to the Nanmen Station of the WuxiJiangyin Intercity Rail Transit project. Compared to castinplace reinforced concrete struts, the prefabricated DHSS can save costs by 35% and reduce carbon emissions by 68% after being reused five times.