The invention relates to the technical field of lamps, in particular to an illumination device. The illumination device comprises a main lamp pole, an inner fixing cylinder, an inner clamping rod, a first screwed connection base, an upper mounting part, outer clamping rods, first LED lamp bodies, a second screwed connection base, a lower mounting part, first bent rods and second LED lamp bodies, wherein the inner fixing cylinder is connected to the end part of the main lamp pole in a screwed mode through threads, the inner clamping rod is arranged in the inner fixing cylinder in a penetratingmode in the radial direction of the inner fixing cylinder, the first screwed connection base is connected to the upper end of the inner clamping rod in a screwed mode through threads, the upper mounting part is connected to the upper side of the first screwed connection base in a clamped mode, the outer clamping rods are connected to the upper side of the upper mounting part in a clamped mode, thefirst LED lamp bodies are connected to the upper ends of the outer clamping rods in a clamped mode, the second screwed connection base is connected to the lower end of the inner clamping rod in a screwed mode through threads, the lower mounting part is connected to the lower end of the second screwed connection base in a clamped mode, the first bent rods are connected to the lower side of the lower mounting part in a clamped mode, and the second LED lamp bodies are connected to the lower ends of the first bent rods in a clamped mode.