The utility model discloses a simple and easy device convenient to weld strain piece and wire, it comprises fixing device, spring pressing piece, can slide tray and base, a serial communication port, fixing device form by screw and gasket, spring pressing piece one end be equipped with the screw hole, through the screw install in can slide the tray surface with fixed wire and foil gage, slided tray have thermal -insulated release coatings's iron plate to make by the cover, the surface is equipped with the Y type circular arc recess that is used for placing the wire, the iron plate bottom is equipped with the rectangle arch, the base be equipped with the iron plate of rectangle recess for the surface, its recess with the rectangle arch of tray of can sliding is agreed with mutually, realizes sliding. The utility model discloses simple structure, be easy to learn and use, adaptable various environment, can improve the welding efficiency of foil gage and wire effectively.