Research conclusions：According to the characteristics of intercity railways' traffic organization modes of train stopping at major station, train stopping at every station and train overtaking, the analysis and calculation of the influence of the different layout forms of intermediate station on train interval. From the study, it is concluded that the intermediate station of the intercity railway where train overtaking doesn't exist and mainly serves for the passenger flow from the train stopping at major station, is appropriate to adopt the form of no arrival and department tracks, the intermediate station of the intercity railway where mainly serves for the passenger flow from the train stopping at major station and there is basically no every-station-stopping train, is appropriate to adopt the form of side-platform with two arrival and department tracks, the intermediate station of intercity railway where mainly serves for the passenger flow from the train stopping at every station, is appropriate to adopt island -platform with 2 arrival and department tracks, and the intermediate station of the intercity railway where mainly serves for the passenger flow from the train stopping at every station and joints with other intercity railway, is appropriate to adopt the island-platform with 4 arrival and department tracks.