Research conclusions：Based on scheme analysis of introducing Guiyang-Guangzhou line into the hub, the paper identifies the reasonable recommended scheme by linking Guiyang station with passenger external line. By demonstration and comparison of the extension plans of introducing Guiyang-Guangzhou line into the Guiyang Station, the paper identifies the plane introducing scheme, analyzes the using of arrival and departure tracks and other issues, proposes the scheme selection principles of introducing passenger dedicated line into the existing station under normal condition: (1) When the terrain condition is better and other restricted conditions are less, the partitioned layout form of high speed and common speed field can be preferred.(2) When the terrain, demolition and other constraints restrict introducing, the elevated station can be adopted. (3) When the restriction conditions are more, and the existing lines need to be made full use of, the plane connection way can be used, especially for larger intermediate station and passenger station and the economical and practical of the scheme should be fully studied. (4) The research conclusion has the actual reference significance for scheme of introducing passenger dedicated line into existing station.