The invention relates to an automated assembly device of light-emitting diode (LED) finger lamps. The automated assembly device of LED finger lamps comprises a machine frame and a workbench disposed on the machine frame. A big rotary disk is disposed on the workbench. A clamp for placing a bottom cover is arranged on the big rotary disk. An upper bottom cover assembly, an upper slice assembly, an upper battery assembly, an upper LED lamp assembly, an upper switch assembly, an upper top cover assembly, an upper top ring assembly, a lighting detection assembly and a blanking assembly are arranged on the periphery of the big rotary disk. The assemblies are respectively connected with a master control circuit and controlled by the master control circuit. The automated assembly device of LED finger lamps is reasonable in structural design. Automatic feed, detection, assembly and blanking of the assemblies of finger lamps are electrically controlled, production efficiency and product quality are improved, labor intensity of workers is greatly lowered, production cost is reduced, the automated assembly device of LED finger lamp is especially suitable for mass production of key cylinders, and market competitiveness of enterprises can be enhanced.