Aiming at the problem that the energy storage life model is not considered in the distribution network planning, a stepped energy storage life model suitable for the grid planning stage is proposed by using Arrhenius formula. The model changes the non-linear energy storage life model into a linear model by classifying the service life of typical scenarios, and is applied to power grid planning by combining scenario probability. In this paper, a distribution network planning model considering energy storage life constraints is constructed, and an improved BAT algorithm is proposed for adaptive solution, which further improves the global search capability of the algorithm. The numerical example shows that the proposed method is closer to the actual operation than other models, and can significantly reduce the overall cost, and has practical value.