Special sewing machines mainly include: keyhole machine; knotting machine; buttoning machine; blind stitching machine; double needle machine; automatic bag opening machine.

1, buttonhole machine can be divided into: flat buttonhole machine and round buttonhole machine, which can be divided into ordinary flat buttonhole machine, medium and high speed flat buttonhole machine, high speed flat buttonhole machine, automatic continuous Flat buttonhole machine; round buttonhole machine can be divided into ordinary round buttonhole machine, medium and high speed round buttonhole machine, high speed round buttonhole machine, automatic continuous round buttonhole machine.

2, the knotting machine can be divided into: CEI-1 type knotting machine; CEI-2 type knotting machine.

3, the button machine can be divided into: high-speed flat seam button machine; no thread button machine; automatic button buckle machine.