The utility model relates to a buried sacrificial anode metal anti corrosion device, which comprises a sacrificial anode, and the sacrificial anode is connected with a cable. The buried sacrificial anode metal anti corrosion device is characterized in that the sacrificial anode and a part of the cable are installed in a cloth bag, filling materials are filled around the sacrificial anode of the cloth bag, the cloth bag is sealed by a heated shrinkage pipe, and a protective sheath is covered on the cloth bag, and the cloth bag, the heated shrinkage pipe and the protective sheath are arranged in a casing together. The utility model has the advantages of simple structure, convenient and quick use without assembling on the spot, less trouble of site operation, less environmental pollution, and high production efficiency. Because the buried sacrificial anode metal anti corrosion device has no need of assembling on the spot, the buried sacrificial anode metal anti corrosion device also has convenient use and high practicability.