The invention discloses a full automatic edible fungus bag loosening aerator. The full automatic edible fungus bag loosening aerator comprises a machine base, wherein the machine base is fixed with a hollow cylinder, piercing wheels which are used for piercing and aerating fungus bags are uniformly distributed at a bag outlet of the cylinder, the outer circumference of each piercing wheel is provided with a plurality of piercing needles, the outer side of a bag inlet of the cylinder is provided with a fungus bag conveying mechanism, and the fungus bags are transmitted from the conveying mechanism to a fungus bag feeding mechanism in the cylinder; the conveying mechanism is a chain wheel transmission mechanism driven by a motor and a transmission chain; the feeding mechanism comprises first ratchets which are uniformly distributed at the bag inlet of the cylinder, and the fungus bags are loosened through the first ratchets and are transmitted into the cylinder; and the middle part of the cylinder is provided with a hole, a second ratchet of an output shaft of a two-stage feeding motor fixed at the periphery of the cylinder extends into the hole, and the fungus bags are transmitted to the bag outlet of the cylinder through the second ratchet and then are pierced through the piercing wheels at the bag outlet of the cylinder. The full automatic edible fungus bag loosening aerator is convenient to operate, is time-saving and labor-saving, and has high fungus bag piercing efficiency and good loosening and aeration effects.