Abstract: In order to determine the optimal line scheme, terrain, features and environment (slope, slope direction, land use, road, construction land, waters and wetlands, plant communities and cultural relics) were used as the evaluation indexes of railway lines. Based on GIS, an evaluation model of AHP route schemes was established. Taking the railway line scheme between Kangping Station and Faku Station in Liaoning Province as an example, the comparison, selection and analysis of AHP line based on GIS were carried out. The comparison model plays an important role in protecting the ecological environment of railway lines, reducing the project cost and avoiding engineering disasters.