The invention discloses a power battery pack. A gland is arranged at the top of a battery pack body; a convex cover is arranged at one end of the gland; battery packs are arranged on the gland and the convex cover; a partitioning plate is arranged between the battery packs; a rear shell is arranged at the bottom of the gland; fixing shafts are fixed at two ends of the rear shell; fixing holes are formed in the fixing shafts; connecting holes are formed in one side of the rear shell; a USB (Universal Serial Bus) interface is formed between the fixing shafts; a battery base is arranged at the bottom of the rear shell; the rear shell and the gland are cuboids; a buckle is arranged at the bottom of the gland; clamping grooves are formed in the rear shell. The power battery pack is novel in structure, simple in structure, simple and convenient to operate, the power battery pack assembly adopts the clamping grooves, the buckles and the fixing shafts, the power battery pack is of an integral structure and is convenient to mount and dismount, meanwhile the gland and the rear shell are cuboids, are relatively small in size, are small in use area inside an electronic automobile, and can be connected through wireless equipment.