A label stripping and sticking machine comprises a first paperboard groove, a paperboard pushing mechanism, a label stripping mechanism, a label sticking mechanism and a paper taking mechanism. A strip-shaped opening is formed in the bottom of the first paperboard groove. The first paperboard groove comprises two opposite oblique faces, the oblique faces are perpendicular to each other, and the right angle vertex formed by the two oblique faces is located below. A stopping part which is used for preventing the paperboard pushing mechanism from pushing paperboards out of an outlet is arranged at the outlet of the first paperboard groove. The paperboard pushing mechanism comprises a first sliding rail arranged below the strip-shaped opening, a first sliding block arranged on the first sliding rail, a push plate fixed to the first sliding block, and a driving component for driving the first sliding block to move on the first sliding rail. According to the label stripping and sticking machine, the first paperboard groove is designed specially, thus, the first paperboard groove can adapt to labels of various dimensions, the production efficiency is improved, and cost is reduced.