Abstract: An electrode plate inspection device includes a combining unit configured to combine a separator on a side of a first electrode plate in a thickness direction of the first electrode plate, the first electrode plate including at least two sub-electrode plates arranged at intervals in a conveying direction of the first electrode plate; a measuring unit arranged downstream of the combining unit in the conveying direction, and configured to measure a first distance between two adjacent combined sub-electrode plates in the conveying direction; and a processing unit configured to determine whether the combined first electrode plate is qualified according to the first distance.