The invention relates to an LED illumination device. The LED illumination device comprises a metal base plate and a metal annular shade body which are mutually locked, wherein the metal annular shade body is provided with a hollow hole, a containing space is formed between the metal base plate and the metal annular shade body and sequentially provided with a cooling plate, an LED light source unit, a reflecting ring and a transparent cover, and the transparent cover covers the hollow hole; after a light ray emitted by an LED light source is reflected by the reflecting ring, the light ray is projected outwards by the transparent cover; and heat generated by the LED light source unit is dissipated outwards through the cooling plate, the metal base plate and the metal annular shade body.