The invention discloses a vertical double-side laser ink-jet printer. The vertical double-side laser ink-jet printer comprises a rack, the rack is provided with a bottom belt transmission mechanism used for transmitting and fixing paperboards, a side belt transmission mechanism, a plurality of columns, and ink-jet printers used for spraying and coating, side transmission belts of the side belt transmission mechanism are arranged in a side manner, the columns are provided with a plurality of rollers, the paperboards are arranged between the side transmission belts and the columns in a side manner and compressed via the side transmission belts and the rollers, bottom ends of the paperboards are supported via a bottom transmission belt of the bottom belt transmission mechanism, the ink-jet printers are arranged at two sides of the paperboards, and the rack is provided with an elevating mechanism used for elevating the ink-jet printers.