Automatic labeling device applied to material bag sewing and packing belt conveying line

The utility model relates to an automatic labeling device applied to a material bag sewing and packing belt conveying line, and the automatic labeling device is arranged on the belt conveying line of a material bag sewing and packing procedure. The automatic labeling device mainly comprises a frame assembly (1), a stamp assembly (2), a label feeding assembly (3) and a retaining arm assembly (4), wherein the stamp assembly (2), the label feeding assembly (3) and the retaining arm assembly (4) are arranged above the frame assembly (1). The stamp assembly (2) is used for sealing a time stamp on a label. When a material bag is fed to the front of the automatic labeling device by the belt conveying line, a retaining arm (44) of the retaining arm assembly (4) stretches out to make a movable plate (12) of the frame assembly (1) move with the material bag at the same speed, and the material bag and the movable plate (12) are kept relatively static; after the labeling operation is completed, the movable plate (12) returns to an initial position and waits for the next material bag; in a material bag conveying process, the label feeding assembly (3) feeds the label with the time stamp to an opening of the material bag, the retaining arm (44) retracts, and the automatic labeling operation is completed.