The invention discloses an ultra-long-strip-shaped multifunctional LED illuminating rope device. The device comprises transparent or semitransparent externally wrapped protection leather, a main power line, an auxiliary power line, a communication line, a thin pull rope, a decoration accessory, a master control box, a communication reel and a plurality of short LED lamp strings. The main power line, the auxiliary power line, the communication line, the thin pull rope and the short LED lamp strings are wrapped by the externally wrapped protection leather, and the decoration accessory is fixed or semifixed to the externally wrapped protection leather. According to the ultra-long-strip-shaped multifunctional LED illuminating rope device, power supplying of an LED illuminant and the decoration accessory is separated from signals, the power source and the signals are not provided for the decoration accessory through the main power line, and it aims to guarantee that the voltages of the LED lamp strings on the main power line are not divided, so that the brightness of the LED lamp strings is not reduced. Meanwhile, the auxiliary power line is adopted to provide the power source and the signals for the decoration accessory, and is not limited by the signals on the main power line, the form of the decoration accessory can be more diversified, and the use method is more flexible.