Abstract: Combined with the actual construction of Xi′an metro Line 1, Line 6 and Lintong Line, the necessity and rationality of setting Fangzhicheng Station as a threeline transfer station are comprehensively analyzed. Then, combined with the station passenger flow prediction and analysis results, the passenger flow streamlines and the control factors around the station are studied, 3 types of three-line transfer arrangement are proposed respectively. Finally, the layout plan of twoway transfer on the same platform of three lines on the second underground floor is determined through comparison and selection. Combined with the station passenger flow simulation and layout optimization, the weak links of the station passenger flow evacuation are strengthened, the weakness of the three-line transfer station is also overcome.