The invention discloses a high-purity molybdenum rhenium lanthanum ternary alloy guide rod, and belongs to the field of an alloy material. The alloy material for preparing the guide rod comprises, byweight part, 1 to 2 parts of rhenium, 1 to 2 parts of lanthanum, and 90 to 100 parts of molybdenum. The purity of the molybdenum is higher than 99.99%. The molybdenum rhenium lanthanum alloy is subjected to ternary alloying, the material comprises , 1 to 2 parts of rhenium, 1 to 2 parts of lanthanum and the balance molybdenum, the alloy property is greatly improved, meanwhile, the adding amount ofheavy metal rhenium and rare earth lanthanum can be strictly controlled, the production cost of the alloy is reasonably controlled, the number of eddy current inspection crack points of the microwavefurnace magnetic control guide rod made of the alloy is greatly smaller than that of the similar product, the strength range is smaller than that of the similar product, the service life is prolonged, and the product yield is improved.