The utility model relates to a high power LED bulb which comprises a joint connected with the interface of a lighting lamp, a LED constant current driving device, a heat radiator, a LED light source, a bulb shade and a circuit board, wherein the joint is provided with a hollow cavity and the LED constant current driving device is fixed in the hollow cavity; the heat radiator is a ceramic heat radiator with an annular heat radiating fin, the upper part of the joint is fixedly connected with the lower part of the heat radiator; the circuit board is an aluminum substrate circuit board, and the LED light source is fixed on the circuit board; the circuit board is fixed on the top end of the heat radiator, and the bulb shade is arranged above the heat radiator, and the lower part of the bulb shade is fixedly connected with the heat radiator. The utility model provides a high power LED bulb which has high lighting efficiency, good heat radiation effect, low cost, simple production and reliable performance.