Coating device and pole piece production system

The utility model provides a coating device and a pole piece production system. The coating device is used for coating slurry on a base material of a pole piece and comprises a coating roller which can rotate around the axis of the coating roller and is used for coating the slurry; the axial width of the compression roller is matched with the width of a to-be-coated area on the base material, so that the compression roller is used for abutting against the side, opposite to the coating roller, of the to-be-coated area on the base material, and at least part of the to-be-coated area protrudes in the direction close to the coating roller. The pressing roller is arranged to abut against the side, opposite to the coating roller, of the to-be-coated area on the base material, so that the to-be-coated area on the base material protrudes in the direction of the coating roller and makes contact with the coating roller, and the to-be-coated area of the base material is coated with slurry on the coating roller; in this way, only the slurry located at the position, corresponding to the to-be-coated area, on the peripheral side face of the coating roller can be coated on the to-be-coated area on the base material, the slurry on the end face of the coating roller does not need to be scraped off, the coated slurry can be uniform, and the consistency of the thickness of a formed functional layer is improved.