The Donghai County Station of Xulian High Speed Railway is located on the south side of the Donghai County Station of the existing Longhai Railway, and the newly-built entrance and exit overpass will achieve the interconnection between the newly-built station building and the existing station building. Taking the reconstruction of Donghai County Station of the existing Longhai Railway as an example, this paper analyzes and summarizes the design scheme of OCS engineering reconstruction caused by the construction of new platform canopy, entrance and exit overpass and other projects of the train station on the business line, which has certain reference significance for the OCS design in the subsequent reconstruction of existing stations.