The invention discloses a vertical plane coating device. The vertical plane coating device comprises a base; a vertical lead screw and a guide rod are mounted on the base; the bottom of the lead screw is connected with a first motor; the first motor is fixedly mounted on the base; the lead screw is matched and provided with a mobile base with a screw hole; the guide rod is matched and provided with a guide base with a guide hole; a support frame is mounted between the mobile base and the guide base, and is a multilayer structure, wherein a wall printing device is mounted on the lower layer of the support frame; multiple ink nozzles are arranged on the outer side of the wall printing device; the upper end of the wall printing device is connected with a pipeline connecting wire; the pipeline connecting wire is connected to external control equipment; the wall printing device is connected with an ink tank through an ink conveying pipe; and the ink tank is mounted on the base. The vertical plane coating device can once finish printing and film coating on a wall to form a layer of protective film for a pattern on the wall, so that the contact of the pattern with the external is reduced, and the service life of the pattern is prolonged.