The invention discloses a battery cover separating device which comprises a fixing plate, wherein a dual-shaft air cylinder is arranged on the fixing plate and is connected with a pneumatic finger, the dual-shaft air cylinder drives the pneumatic finger to move up and down, the pneumatic finger is connected with two symmetric clamping plates, and the pneumatic finger drives the clamping plates to transversely reciprocate. According to the battery cover separating device provided by the invention, battery covers which are overlapped together can be separated without being manually operated one by one, so that the production cost is reduced, and the production efficiency is increased.