Research conclusions: Through the analysis of the functional orientation, transfer distance, passenger flow and distance between stations of each line，and based on working out and taking the countermeasures，the importance of the three line transfer was presented and the merits of centrally setting up stations for three lines was analyzed. In this way, the difficulties in construction and coordination were overcome，obtaining good results. The following conclusions are drawn: (1) The three line-transfer in Hong Kong Road Station is necessary because the Line 3，Line 6 and Line 7 meet here. (2) From the transfer function and the influence of station construction on surrounding environment, the central setting up station for 3 lines has certain advantages，but the attention should be paid to the positions of the escalators，exits and entrance to make the transfer passage smooth.