Such machinery have selected the state-of-the-art computer-control system and the servo motor directly-driven technology, which makes their power consumption about 50% lower than the traditional ones. The feeding mechanism has adopted two high-quality pulse motors so that the feeding is more accurate and stable. They function in the automatic cutting of top and bottom threads. The tiny-oil lubrication mode makes the sewing materials from contaminations. Through the setting of procedures, 49 kinds of standard bartacking patterns can be selected. Also, in the X and Y direction, the 10-200% pattern zooming functions can be realized. By equipping different accessories to the same machine, different sewing effects can be realized. Patterns like the cap hole, semicircle and round can be sewn. They are applicable to the bartacking of the plackets of high-quality garment lower hems, pocket opening and brands, to form pretty fastening stitches.