The invention discloses an automatic strapping device which comprises a material clamping mechanism, a material bearing mechanism, a push-out twisted strip mechanism, a ribbon shearing mechanism and a ribbon clamping mechanism which are arranged on a fixed rack, wherein the material clamping mechanism is located at the top of the rear side of the fixed rack; the material bearing mechanism is correspondingly located on the front side of the material clamping mechanism; the push-out twisted strip mechanism and the material bearing mechanism are correspondingly arranged on the front side of the fixed rack; the ribbon shearing mechanism is located at the bottom of the rear side of the fixed rack; the ribbon clamping mechanism is located on the upper side of the ribbon shearing mechanism. The invention also discloses an apparatus for sewing shoulder girdle head passing lingerie buckles. The automatic strapping device is used in the apparatus for sewing shoulder girdle head passing lingerie buckles, and high in degree of automation and high in strapping efficiency, and can be used for reducing the production cost, improving the production efficiency, and ensuring the quality of production.