Abstract: In the framework of prospect theory,this paper studied the path choice behavior of passengers who travel with the subway and public transit. Firstly,passenger travel time under normal operation condition was defined as generalized cost unit(GCU),and SP investigation was used to quantify the affects factors of path choice to build the generalized cost calculation function. Then,expected travel cost,which was calibrated by using reservation travel time,was used to select reference points. At last, the path choice model was validated by a case study and it showed that the calculation result was 90% fit with the choice of respondents which meant that the path choice model could be used in real application.