The invention discloses a portable storage battery pack which comprises a fastening device and a plurality of storage batteries, wherein the storage batteries are arranged in the fastening device; supporting plates are arranged at the bottoms of two adjacent groups of storage batteries in the horizontal direction; a supporting column is arranged at one end of each supporting plate; through holes are formed in the middle parts of the supporting columns; stop doors are arranged at the tops of the supporting columns; springs are arranged between the bottoms of the stop doors and the tops of the supporting columns; a pushing device is arranged on one inner side of each supporting plate; the pushing devices comprise fixed columns I and fixed columns II; the side edges of the fixed columns I andthe fixed columns II are all fixed on the inner sides of the supporting plates; a disk is arranged in a position, which is close to one side of each fixed column I, on one side of each fixed column I; limiting columns are arranged at the corners of the disks. The portable storage battery pack has the beneficial effects that the portability of the storage battery pack is improved, and assembling and replacement of the storage batteries are facilitated.