The invention discloses an automated press line for square shells of mobile phone batteries. The automated press line comprises a punch press, wherein a notching device is arranged at a feeding end of the punch press and comprises an upper notching die and a lower notching die, the upper notching die comprises two parallel upper formworks, a notching punch head is arranged between the two upper formworks, a floating chip is arranged at a tail end of the lower part of the notching punch head, the lower notching die comprises a lower die bottom plate and is internally provided with a cavity die framework, the cavity die framework is internally provided with a floating cavity die, the upper part of the floating cavity die is connected with a material guiding plate, a material jacking core is arranged at the lower part of the floating cavity die, and a material jacking spring is vertically connected to the lower part of the material jacking core. According to the automated press line, by improving the punch press and arranging the notching device at the feeding end of the punch press, a notching procedure is preformed directly after stretching molding is completed, so that aerostatic presses are prevented from being used massively, noise pollution is prevented, the labor intensity of workers is reduced, the structural cost is saved, and the space is utilized reasonably.