The sewing of cotton, blankets, and children's blankets with lock and edge wrapping is a type of single thread wrapping stitch. After locking, the edge of the blanket is neat, preventing the fabric from becoming loose and extending the service life of the blanket. At the same time, the stitch has a certain decorative value and improves the appearance quality of the product. After installing the edge roller, edge sewing can be performed. For children's blankets, a small overlock sewing machine is used to lock the edges before sewing with this machine.