Roller coater for printing three-dimensional patterns and printing process

The invention discloses a roller coating mode with a three-dimensional pattern, and belongs to the technical field of printing. The roller coating mode comprises a rack and a conveying belt, and the conveying belt is arranged on the rack in a penetrating mode; a coating box and a first motor are fixedly installed on the rack, an ink dipping roller, an ink transfer roller and a coating roller are further rotationally installed on the rack, an output shaft of the first motor is fixedly connected with the ink dipping roller, and part of the ink dipping roller is located in the coating box; the peripheral surface of the ink dipping roller is attached to the peripheral surface of the ink transfer roller, and the peripheral surface of the ink transfer roller is attached to the coating roller; a plurality of first grooves are formed in the peripheral face of the coating roller in the circumferential direction of the coating roller, and the coating roller is used for being attached to the upper surface of a plate. In