The invention relates to the technical field of fire extinguishing devices, in particular to a height-adjustable fire extinguisher storage device. The height-adjustable fire extinguisher storage device comprises a protection box, a fixing mechanism, a lifting mechanism, a limiting mechanism, a transmission mechanism and a placing mechanism. When a fire disaster occurs, a user rotates a handle andpushes the handle, so that the handle drives a connecting rod to move towards the inside of the protection box; and then a clamping block at the end portion of the connecting rod is clamped in a toothgroove, the connecting rod drives the transmission rod to rotate, the transmission rod drives a third gear to rotate, the third gear drives a fourth gear to rotate, the fourth gear rotates at a faster speed due to the fact that the diameter of the third gear is larger than that of the fourth gear, the fourth gear rotates to drive a rotating shaft to rotate, the rotating shaft drives a disc to rotate, and the disc drives a fire extinguisher body to rotate, so that the fire extinguisher body is fully shaken before being used, uniform distribution of chemical extinguishing substances in the fireextinguisher body is guaranteed, operation steps and time for the fire extinguisher body are saved for a user, and the use effect of the fire extinguisher body is guaranteed.