Abstract: A novel model was provided for making ticket price of urban rail transit based on second best theory in this paper.It was the objective function to attain the maximum social welfare in the model,and no deficit constraint was present for the urban transit operators.Moreover greenhouse gas emission and model choices of transportations factors were considered.To represent an approach of making monthly and the general ticket price,the specific distinction between consumer and non-consumers was given.Considering maintenance cost of civil works,the model was used to making ticket price of Beijing urban rail transit based on the 2005 data of Beijing and Statistical data of greenhouse gas emission in Japan.Due to factors considered in the low-carbon economy,the results shown that the ticket price was slightly lower than the actual price and the reasonableness of the model was verified.