Automatic strapping machine

The invention relates to an automatic strapping machine. The automatic strapping machine comprises: a frame; the sliding block is connected to the rack in a sliding manner and is used for fixing a lock head of the ribbon; the groove comprises a straight line section and a surrounding section which are communicated with each other, the extending direction of the straight line section is parallel to the sliding direction of the sliding block, the surrounding section is arc-shaped, the end point of the surrounding section extends towards the straight line section around the axis of the surrounding section, and the axis direction of the surrounding section is perpendicular to the sliding direction of the sliding block and is parallel to the arrangement direction of the two groove walls of the groove; the sliding block pushes the toothed belt of the ribbon to slide into the surrounding section from the linear section through the lock head, and the end, away from the lock head, of the toothed belt slides in a surrounding mode along the surrounding section and then aligns and extends into the lock head. According to the automatic strapping machine, the sliding block used for fixing the strapping tape lock head is arranged, the sliding block can push the toothed belt of the strapping tape to stretch into the lock head through the lock head, and therefore automatic strapping of the automatic strapping machine on materials can be conveniently achieved.