The invention discloses a round bottle label quality detecting device. The round bottle label quality detecting device comprises a conveying belt, a label discharging mechanism, a bottle rolling plate, a bottle rolling belt and an imaging component. The label discharging mechanism discharges a label, the front end of the label makes contact with a bottle body and is pasted to the bottle body, thebottle rolling plate and the bottle rolling belt are arranged on the two sides of the conveying belt, the bottle body is clamped, the bottle rolling belt rotates, the bottle body is driven to rotate,and the label is pasted to the bottle body. The bottle rolling plate is provided with a label detection window, the upper edge of the label detection window is higher than the upper edge of the label,and the lower edge of the label detection window is lower than the lower edge of the label; and the length is larger than the perimeter of the bottle body. The bottle rolling plate is provided with the long-strip-shaped detection window corresponding to the label in height, and the length of the detection window is larger than the perimeter of the round bottle. The bottle rolling belt is utilizedfor rotating the round bottle, the imaging component can collect the integral state of the label, the detection dead angle is avoided, the detection accuracy rate is effectively increased, and the phenomenon of mistaken removal is avoided.