Flatbed, interlock stitch machine with top cover thread for plain seaming, this versatile machine can be used for all kind of special machine by changging accessories, to meet different patten stitch in good quality. Flatbed, interlock sewing machine, adopt with silicon oil device and needle gauge adjustment, no oil leakage, protect device, with top cover thread for plain seaming auto trimmer, press foot lift, needle position, work more effciency.