Aiming at the problem of how to plan the allocation of distributed generation(DG)in the process of distribution network construction so that the grid company and users can obtain considerable benefits,the paper proposes a cooperative optimization model between the grid company and users that takes into account the influence of seasonal factors.Firstly,the overall framework of DG construction plan is constructed by considering the interaction between distribution network construction and operation.Secondly,the distribution network planning model under the constraint of reliable operation is constructed by taking the economy of new distribution lines as the target and taking into account the cost of carbon tax.Then,a user benefit model is initially constructed by considering the distribution of distributed generation(DG)and the adjustment of power consumption strategies during operation.To address the optimization problem,a co-optimization model is proposed using a genetic algorithm,aimed at maximizing overall benefits.The feasibility of this co-optimization model is then validated using the IEEE33 node network.The results demonstrate that the proposed distribution network benefit optimization model,which incorporates clean energy access and seasonal factors,can effectively enhance operational benefits while improving overall performance.