The invention provides a battery swap system for all-electric commercial vehicles, comprising a lifting frame, a lifting mechanism and a carrying mechanism. The lifting mechanism comprises a lifting portion and a lifting drive portion; the lifting portion is disposed movably in a vertical direction relative to the lifting frame; the lifting drive portion is used for driving the lifting portion to move up and down. The carrying mechanism is connected with the lifting mechanism and can move with the lifting mechanism. The carrying mechanism is used for carrying objects to be transferred, into and out of the system. The system has the advantages that batteries can be quickly swapped for the all-electric commercial vehicle and battery swapping time is shortened.