Sewing mechnism of automatic packer with opening seal

The utility model relates to a sewing mechanism of an automatic packer with an opening seal, which comprises a sewing machine, a motor, a belt wheel, a Z-shaped V belt, a hand wheel and a thread frame. The utility model is characterized in that the sewing mechanism also comprises an electromagnetic clutch and can control the starting and the stopping of the sewing machine via the electromagnetic clutch, and the utility model is also provided with a mechanism which forces a sewing machine needle to stop at an upper dead center. The utility model has the advantages that the motor needs not frequent stopping and starting in the process of work, so the service life of the motor can be extended. The stitch space at the head of a package bag is the same, the thread trace is straight, the thread braid is short, and the utility model can not break the needle when restarts for debugging.