Abstract: In order to solve the problems of poor forming effect, high cost of secondary decoration, difficulty in quality control of concrete pouring and maintenance, complex construction procedures, and difficulties in civilized construction management caused by the use of cast-in-place technology for inspection pit columns in traditional subway sections, a new prefabricated short column assembly construction method for column inspection pit assembly columns is now adopted, which can achieve technological innovation in standardized design, factory production, and assembly construction of column inspection pits. This technology adopts the construction method of "fixing short columns in groups with fixtures, pre leveling, vertical lifting, direct placement, and grouting bottom plate". After on-site inspection, the goal of meeting quality data standards, direct on-site assembly, and recycling of splicing facilities has been achieved. Compared with traditional construction methods, adopting this method can reduce a large amount of concrete pouring operations, save manual labor, improve work efficiency, effectively save 30% of steel bar usage, reduce on-site construction time by 50%, and increase comprehensive benefits by 20%.