The invention discloses a fixing device for VRLA (valve regulated lead acid) batteries. The fixing device comprises a fixed bottom plate, wherein two connecting rings are arranged on each of two sides of the fixed bottom plate, a rotary connecting rod is arranged between the connecting rings on each of two sides of the fixed bottom plate in a penetrating manner, two supporting rods are arranged at the top of the rotary connecting rod and located between the corresponding two connecting rings, one end of the top of each supporting rod is connected with a fixed side plate, a fixed top plate is arranged at the tops of the two fixed side plates, strip-shaped clamp blocks are arranged on two sides of the bottom of the fixed top plate, strip-shaped slots corresponding to the strip-shaped clamp blocks are formed in the tops of the fixed side plates, and two front strip-shaped through holes and two rear strip-shaped through holes are formed in the fixed bottom plate. With the adoption of the fixing device for the VRLA batteries, the fixing effect is effectively improved, fixation is more convenient for a user, the use is more convenient, so that the fixing effect can be better, and more convenience is brought to the user.