The invention discloses a plastic label. The plastic label comprises a plastic substrate layer, a printing layer and a moisture absorption layer. The printing layer is located on the upper surface or the lower surface of the plastic substrate layer, and the moisture absorption layer is located on the bottommost layer. The plastic label is characterized in that the upper surface of the moisture absorption layer is provided with a bottle-washing functional layer. According to the plastic label, due to the fact that the bottle-washing functional layer is additionally arranged on the upper surface of the moisture absorption layer, a double decomposition reaction is conducted by means of ammonium ions in the bottle-washing functional layer and hydroxyl ions in cleaning fluid, gas is released to produce butting force, the label is stripped from a container wall where the label is stuck, the purpose of washing a bottle is achieved, the bottle-washing effect is good, and special shrink plastic does not need to be selected.