The invention discloses a horizontal battery structure for preventing self-discharge. The structure comprises a protection pipe which is sleeved with a horizontal battery, and an inner wall of the protection pipe is provided with a groove; the groove is internally provided with cement, a reinforcing layer and a rubber band layer; the reinforced layer comprises several opposite reinforcing units, each reinforcing unit comprises two rocking arms which are hinged with an inner wall in the groove, the two rocking arms are opposite, and each rocking arm is provided with an elastic layer; each rocking arm is provided with an inclined hole, a transverse groove, and a heating groove, the top of the inclined hole is provided with a water capsule, and the top of the water capsule is provided with awater spraying hole; an inclined block is slidably connected in the inclined hole, and a first spring is arranged between the inclined block and the inclined hole; a metal tooth bar is slidably connected in the transverse groove; a heating gear is rotarily connected on an inner wall of the heating groove, the heating gear is provided with a heating hole, and a heating electric thread is arranged in the heating hole. The scheme mainly solves the problem of self-discharge due to crack of a horizontal battery housing in the prior art.