Abstract: As the part of the power system that is most closely connected with power users, the distribution network shoulders the important responsibility of distributing electrical energy from the power grid to users. Improving the power supply reliability of distribution networks and achieving the goal of "no power outage" for distribution networks is the development direction of power grid enterprises. However, at present, there is a lack of scientific assessment measures to assist the power grid in choosing the development route of technical measures to improve the power supply reliability of distribution networks. Based on the analytic hierarchy process, this paper constructs a cost and effectiveness evaluation model for two technical measures to improve the power supply reliability of the distribution network: The transformation of the distribution network framework and the operation without power outage. This model can comprehensively evaluate the implementation costs of the two technical measures, the number of households reduced during planned transformation power outages, and the number of households reduced during emergency repair power outages, and give reasonable scores for the two technical measures according actual cases. This model can provide a theoretical basis for power grid enterprises to make scientific decisions on technical measures that are in line with the specific conditions of distribution networks in various regions, and improve the power supply reliability of distribution networks.