The utility model discloses an automatic labeling device, including the platform of plugging into, the bench of should plugging into is equipped with a triaxial portal frame, the triaxial portal frameincludes the coexistence post, the bottom of coexistence post all is connected with Y axle numerical control sliding table and drive Y axle numerical control sliding table along the gliding Y axle servo motor of Y axle direction, be equipped with X axle numerical control sliding table and drive X axle numerical control sliding table along the gliding X axle servo motor of X axle direction on thecrossbeam, be equipped with Z axle numerical control sliding table and drive Z axle numerical control sliding table along the gliding Z axle servo motor of Z axle direction on the X axle numerical control sliding table, install suction means on the Z axle numerical control sliding table, the bench of plugging into still is equipped with PLC controller and touch -sensitive screen device, the touch-sensitive screen device is connected respectively to the PLC controller, X axle servo motor, Y axle servo motor, Z axle servo motor, suction means, detection device and label paste the mark device. The utility model discloses realize that the online mark that pastes reduces the cost of labor, improve work efficiency, guarantee product quality's stability.