Developing a power emergency service management platform，and establishing as well as perfecting the power emergency mechanism is of great significance to enhancing the emergency supporting capability of a power system.A rational scheduling of existing mobile emergency power sources plays an important role in minimizing the outage costs of important customers and improving the capability of handling unforeseen power outage.Most of the existing research work on power emergency service focuses on the establishment of an emergency evaluation index system and the development of an emergency management platform.Up to now，the optimal scheduling problem of urban mobile emergency power sources has not yet been systematically addressed.Given this background，a bi-objective optimal scheduling model of urban mobile emergency power sources is developed for the first time.First，the scheduling model is mainly formulated as one with two objectives，the minimization of the total outage costs of all important consumers concerned and the minimization of the surplus of mobile emergency power sources.In this optimization model，the maximum function and sign function are respectively included in the objective function and the constraint set，which make the optimization problem very difficult to solve.In order to efficiently solve this problem，two 0-1 variables are introduced to transform this optimization model into a mixed integer linear programming problem which is easier to solve.Then，a solving method based on the delamination sequence method is proposed.Finally，a sample example is taken for demonstrating the feasibility and efficiency of the optimization model and solving algorithm developed.