Overlock stitches can be divided into single line, double line, three line, four line, five line and six line, etc.

1. Single-line overlock sewing machine is a single-needle and one-line stitch, which is mainly used to sew a blanket edge;

2, double-line overlock sewing machine is a single-needle double-line stitch, mainly used to sew large elastic parts such as the bottom of the elastic shirt;

3, the three-line overlock sewing machine is a single-needle three-line stitch, which is a common stitch for ordinary knitwear, especially the stitching of some garments with low grades;

4, four-line overlock sewing machine is a double-needle four-wire stitch, which adds a needle thread than the three-line overlock, and the strength is improved. It is used for stitching or stretching of clothes with higher grades, and the friction is stronger. Parts such as shoulders, sleeves, etc., especially the sewing of the outer garment;

5, five-line overlock sewing machine is a double-needle five-line stitch, its stitch fastness and production efficiency are further improved, the elasticity is better than the four-line overlock, often used for the sewing of outerwear and complementary underwear.