Packaging barrel code pasting device

The utility model belongs to the technical field of code pasting equipment, and discloses a packaging barrel code pasting device which comprises a supporting column, the top end of the supporting column is fixedly connected with a workbench, a sweeping frame is fixedly installed on the left side of the top of the workbench, a top hole is formed in the middle of the top end of the sweeping frame, and a square frame is movably installed in the top hole. By arranging the first driving motor, the half gear, the square frame and the brush, the first rotating shaft can rotate by starting the first driving motor, the half gear can be driven to rotate due to rotation of the first rotating shaft, and the outer surface of the half gear is connected with the inner wall of the square frame in a meshed mode; therefore, rotation of the half gear can drive a square frame and a sliding block to move front and back, a brush can move front and back in a reciprocating mode, then dust on the surface of the packaging barrel can b