The invention discloses a multi-objective distributed power supply optimal configuration method. The method comprises the steps of constructing a multi-objective optimization model based on the environmental benefits, the power supply reliability and the economic cost; establishing the constraint conditions of the multi-objective optimization model according to a probability model of a renewable energy distributed power supply; optimizing and solving the multi-objective optimization model through a preset algorithm; and taking the multi-target distributed power supply configuration scheme corresponding to the obtained optimal solution as a final multi-target distributed power supply optimal configuration scheme. According to the method, the environmental benefit, the power supply reliability and the economic cost of the distributed power supply are considered at the same time, the economical efficiency of the operation of the power distribution network can be effectively improved, andthe technical problem that the economical efficiency of operation of the power distribution network is lower due to the fact that the factors of the environmental benefit and the economic cost are notconsidered in distributed power supply planning in the existing power distribution network is solved.