Empty ring sewing up method and empty ring sewing up device of sewing machine

A miss loop sewing-in method and miss loop sewing-in device for a sewing machine, makes that a miss loop end absorbed into the suction pipe of a miss loop disconnecting means to cut performs blow-return movement between the cloth terminal cut-off knife through needles for sewing machine. Under the action of the auxiliary air flow sprayed out from the rear lateral position to the inclined front side relative to the blow-return movement track of the miss loop, the miss loop end of the blow-return movement moves to a miss loop holding device side provided at the near side of a needle location section to be held by the miss loop holding device, therefore the invention not only can simplify the structure without impeding the operations and resulting in visual impairment, but also can reliably and successfully sew the miss loop into the stitch of a sewing start end of a next sewing material.