Abstract:The underground diaphragm wall slotting process is a continuous down-cutting dynamic process starting from the ground, and grooving equipment is used for the construction process. In view of the clearance limitation in low clearance environment, the selection of appropriate construction technology is the key link of the construction. According to different low clearance slotting construction projects, four kinds of low clearance slotting construction technologies are summarized, and combined with the investigation report of Wangjiadun station project, the appropriate construction technology selection for this project is given, which means great guiding significance to engineering practice.