The utility model discloses a lead acid storage battery assembly structure used for solving the problem of tight assembling of plate groups of an acid storage battery. The lead acid storage battery assembly structure comprises a storage battery housing, wherein six cells are arranged in the storage battery housing; a plate group comprising positive and negative plates and a partition plate is assembled in each cell; specially, an elastic plug side frame is arranged between each plate group and the cell wall; each plate group and the cell wall are pressed on the two sides of each elastic plug side frame. By adopting the elastic plug side frames, the number of plug side frames can be reduced, the extrusion forces on plates are uniform at the same time, and the effect of tightening the plate groups is achieved. Due to the adoption of the design of the lead acid storage battery assembly structure, the storage battery assembly operation can be simplified, the storage battery assembly reliability is improved, and the disadvantage of the falling of plate active materials due to the loosening of the plate groups is eliminated or lowered.