The present disclosure discloses an illumination device, including: a first lamp body; a driving power supply component received in the first lamp body; a second lamp body connected with the first lamp body; and a light source component received in the second lamp body; the light source component includes a light source substrate, a plurality of first light-emitting units and a plurality of second light-emitting units disposed on two surfaces of the light source substrate respectively; an interior of the first lamp body is provided with a reflector configured to reflect light emitted from the plurality of first light-emitting units; an interior of the second lamp body is provided with a lens pressing against the light source component and configured to perform a light condensation and a light collimation to light emitted from the plurality of second light-emitting.