The utility model provides a circuit board, electric elements and display device. This circuit board is including the wiring pad for with the binding post welded connection of first circuit board, a plurality of sub - pads are split into to the wiring pad, and the cut -off rule of cutting apart the pad of work a telephone switchboard intersects in in the first place, in the first place for the geometric centre of the pad of working a telephone switchboard. The cut -off rule that the pad of working a telephone switchboard is cut apart through the messenger to this circuit board intersects in the geometric centre point of wiring pad, the gas that produces among the binding post welding process of pad and first circuit board that enables to work a telephone switchboard is discharged to its edge from the geometric centre point of wiring pad through the cut -off rule clearance of cutting apart formation, thereby the welding bubble when elimination or reduction welding between wiring pad andthe binding post, make the connection of the two more firm, the area of contact between wiring pad and the binding post has still been increased simultaneously, dispel the heat more easily after making the two welding.