the machine is suitable for the sofa production. to upgrade the products quality and improve working efficiency while stapling elastic belts to wooden frames. to strength out six belts homogeneously, keeping them in the same tension and length. stapling the elastic belts on the wooden frame, the machine going back and ensuring the equal tension of six belts. and then stapling the belt on the other side of wooden frame, cutting the belts. for the belts length, tension, distance between two belts, number of belts, it is adjustable. an additional hand-operating lifting table facilitating working.