The invention discloses a bar tacker. The bar tacker comprises a bar tacker body located on a machine base, an operating table face, a feeding device, an automatic detector, a pressing device, a shearing device, a folding device and a conveying device, wherein a sewing table face is arranged on the bar tacker body; the feeding device, the automatic detector, the pressing device, the shearing device, the folding device and the conveying device are fixedly arranged on the operating table face in sequence; the folding device is fixedly connected with the conveying device, shell fabric enters the operating table face through the feeding device and is conveyed into the folding device through the automatic detector, the pressing device and the shearing device; after being folded trough the folding device, the shell fabric is conveyed to the sewing table face of the bar tacker body through the conveying device to be sewn. The bar tacker is convenient to operate, manual operation is avoided, mechanical automation is achieved, production efficiency is achieved, production cost is reduced, market requirements are met, and the bar tacker is applicable to promotion and application on a large scale.