In order to better guarantee the operation effect of power equipment, a battery discharge peak power control method based on Improved PSO algorithm is proposed. The operation parameters between the peak power of battery discharge and external power supply are collected, and the operation parameters are switched by using the support bus. The power acquisition process of battery operation is standardized, and the power of battery power conversion unit is controlled by improving PSO algorithm. The results show that the control error of the battery peak power control method based on the improved PSO algorithm is significantly lower in the actual process, and the control accuracy is improved.