A wide-angle emitting LED driven by built-in power and an assembling method are provided. The wide-angle emitting LED includes a transparent substrate, at least one light-emitting chip, and a driving circuit component. The front of the transparent substrate is provided with a printed circuit where a portion of an upper surface of the transparent substrate is provided with a plurality of conductive bonding pads. Each of the at least one light-emitting chip is bonded on the front of the transparent substrate, and the at least one light-emitting chip is electrically connected to the conductive bonding pads by metal wires. In addition, the driving circuit component is bonded with the transparent substrate and the conductive bonding pads and is electrically connected to the conductive bonding pads by metal wires.