The invention relates to a juicing device of a full-automatic fruit and vegetable facial mask machine. The juicing device comprises a barrel, a threaded rod and a driving device, and is characterized in that the driving device and the threaded rod are connected in a driving mode, the threaded rod is arranged in the barrel in a sleeved mode, protruding threads are arranged on the surface of the threaded rod, the gap between the threaded rod and the barrel gradually narrows in the juice outlet direction, a residue outlet end is arranged at the other end of the barrel, the barrel comprises a front barrel body and a rear barrel body, a feed pipe communicated with the inner portion of the barrel is arranged on the upper portion of the front barrel body, a conical cover is coaxially arranged in the rear barrel body, a filter screen is arranged on the conical cover, the conical cover shrinks in the juicing direction, and a juice outlet is formed in the portion, below the conical cover, of the rear barrel body. When the juicing device is used for squeezing of the facial mask machine, the squeezing speed is low, the temperature is low, nutritional ingredients in fruits and vegetables are not prone to damage, fiber compositions reserved in the fruits and vegetables are beneficial to facial mask forming, and facial mask forming quality is improved.