Abstract: A LED downlight capable of regulating illumination angle is composed of a light source device, a swing component, a light distribution mechanism, a rotation component, a casing component and a power source device. The swing component is disposed at a bottom surface of the light source device. The light distribution mechanism is disposed at the bottom surface of the light source device. The rotation component is coupled to the swing component. The casing component is located at a bottom of the swing component. The power source device is disposed at a periphery and connected by a wire to supply power to the light source device. The rotation component can be operated to perform horizontal rotation, and the swing component can be operated to carry out vertical swing during usage so that a user selects and regulates required beam projection direction and angle to have powerful practicality in illumination.