Label printing device for liquefied petroleum gas steel cylinder

The utility model relates to a liquefied petroleum gas steel cylinder label printing device which comprises a box body, the back wall of an inner cavity of the box body is rotatably connected with a label disc, a label body is wound in the label disc, and a printing device body used for printing the label body is arranged in the box body. A film printing mechanism used for printing a film on a label body is arranged in the box body, a cutting mechanism used for cutting the label body is arranged in the box body, and a film pressing assembly is arranged on the bottom wall of an inner cavity of the box body. According to the liquefied petroleum gas steel cylinder label printing device, a positioning plate is pushed to move downwards under the elastic action of four limiting springs, namely, when the positioning plate moves downwards, a movable frame and a driven roller are driven to move downwards, the outer side of the driven roller makes contact with the upper surface of a protective film, and the protective