Research Conclusions: Under the complicated existing condition in the station, the section size of supporting columns and the structure height being limited, the columns are located among the tracks for the first time and some innovated design and technology are adopted, such as large span over-passing two platforms, long-suspending-extending structure and so on. Thus, it is realized that there are no columns on all platforms. This research resolved many difficulties in engineering process. On the other hand, it is indicated that large span and steel structure is the same with construction of no-platform-column canopies.