Aim at the modeling problem for distribution service network (DSN) of comprehensive passenger transport hub (CPTH), the three-phrase modeling method for designing DSN is proposed, which consists of factor analysis, factor description and network integration. Based on the analysis to passenger transport behavior demand, the conception of DSN is defined for the first time. The DSN is a network system possesses of spatial-temporal feature and distribution function, which is coupled by three parts such as internal passenger flow distribution infrastructure, passenger organization process and guidance service facilities. Using the theory and method of system engineering to study on the properties of three layers, the property description model for each layer is established. By integrating space attribute data and service attribute data of each layer, the three-phrase modeling method and operation process are put forward, therewith, the model of DSN is built, ultimately realizes the digital description of DSN. The case shows that this method has strong readability and operability.