The sewing unit for preparing belt loops is designed to prepare double folded belt loops with inserted tape. The operator can form belt loops in a very consistent quality with high productivity. The sewing unit for preparing belt loops uses Maier 221 Class blind stitch sewing head. The sewing unit for preparing belt loops is equipped with auto tape feeding system, belt loop pressing kit, 8 and 10 mm loop width gauge set. The adjustments of stitch depth are very easy when sewing on different thickness fabrics.