(1) double-sided labeling machine of blood typing card adopts siemens plc control and schneider servo motor drive. Featuring fast speed, high accuracy, high stability, durability, application flexibility and other advantages, it drastically improves the production efficiency and saves the cost; (2) with adoption of photoelectric detection and stepless speed regulation, it has advantages such as accurate labeling and high accuracy. Every box is labeled, and it can monitor and correct automatically if there will be no label; (3) it can be used independently, with products to be placed on feeding end or discharging end, or it can be used online.