The extensive integration of distributed generators (DG) holds significant importance for the development of distribution networks, while the optimal configuration of energy storage systems is critical for enhancing the network’s capacity to accommodate DG. To address the issue of reduced stability in distribution network operations caused by high DG penetration, this paper establishes a multi-objective optimization model aimed at minimizing active power losses, voltage deviation, and optimizing the economic planning of energy storage. The model is based on the IEEE-33 node system and is solved using the Multi-Objective Jellyfish Search Algorithm (MOJSA). The research results indicate that the proposed method effectively optimizes the relevant indicators of the distribution network under various constraints, thereby improving the system’s economic efficiency and reliability.