The invention discloses a simple device for facilitating welding a strain gauge and a using method of the simple device. The simple device comprises a fixing device, a spring pressing sheet, a slidable tray and a base and is characterized in that the fixing device is composed of a screw and a gasket; one end of the spring pressing sheet is provided with a threaded hole, and the spring pressing plate is mounted on the surface of the slidable tray to fix a conducting wire and the strain gauge; the slidable tray is made of an iron plate covered by a heat-insulated anti-adhesion coating, and a Y-shaped circular arc groove for placing the conducting wire is formed in the surface of the slidable tray; the bottom of the iron plate is provided with a rectangular bulge; and the base is an iron plate provided with a rectangular groove in the surface, and the groove is matched with the rectangular bulge of the slidable tray to realize slippage. The simple device is simple in structure, easy to learn and use and capable of adapting to various environments and effectively increasing the welding efficiency of the strain gauge and the conducting wire.