The invention relates to the technical field of plating hangers, in particular to a slender bar plating hanger which comprises a hanger body. The hanger body comprises a hook, a plurality of pipe type clamp assemblies and chains. The pipe type clamp assemblies are fixedly connected to the lower end of the hook and fixedly connected through the chains and comprise outer pipes, fixing holes and fixing screws. The fixing holes are symmetrically formed in the outer pipes in the radial directions and movably provided with the fixing screws. The slender bar plating hanger is simple in structure, a slender bar is quite well fixed through the pipe type clamp assemblies, manpower and material resources are saved, damage to the slender bar is avoided, the plating quality of the slender bar is ensured, and the machining efficiency of the slender bar is improved.