The invention provides a lighting device and a manufacturing method thereof. The lighting device comprises a heat dissipation base material and a circuit layer pasted on the surface of the heat dissipation base material, and at least one electronic element welded to the circuit layer. The lighting device provided by the invention has the advantage that the process of manufacturing a PCB plate is omitted, the electronic element is adhered to the heat dissipation base material, so that the generated heat can be directly transmitted out through the heat dissipation base material without intermediate links and heat accumulation cannot be caused on the electronic element, therefore the service lives of the electronic elements can be prolonged, and manufacturing costs of the lighting device arereduced due to the fact that the PCB material is not used.