Abstract: The large-scale grid connection of new energy has put forward higher requirements for the carrying capacity of distribution networks. However, the existing evaluation of the carrying capacity of distribution networks generally has problems such as single evaluation dimensions and subjective allocation of indicator weights. Moreover, the balance between the improvement of carrying capacity and economic constraints has not been fully coordinated in the process of energy storage configuration. Starting from the perspective of "source network load" collaboration, a distribution network carrying capacity evaluation model that includes flexibility, reliability, safety, and stability is constructed. The entropy weight CRITIC fusion weighting method is proposed to achieve objective weight allocation and reasonable evaluation of distribution network carrying capacity through dynamic normalization processing and indicator conflict analysis; further construct an energy storage optimization configuration model considering the improvement of distribution network carrying capacity with the goal of maximizing distribution network carrying capacity and minimizing energy storage configuration costs. The calculation results show that the proposed energy storage configuration method can effectively improve the carrying capacity of the distribution network while ensuring economic benefits, and ensure the stable operation of the distribution network while improving the new energy consumption capacity of the distribution network.