Abstract: The present invention relates to the technical field of bar-shaped working lights of motor vehicles, specifically providing a combined structure for splicing bar-shaped working lights. It includes several first lamp bodies and second lamp bodies, both ends of which are equipped with splicing slots. The slot ends feature semi-conical holes, forming a trapezoidal structure with internal grooves. The splicing slots are inserted with locking assemblies installed inside. Through modular design, lamp bodies of different lengths can be spliced with locking assemblies, allowing flexible combination of bar-shaped working lights that meet various length requirements.