The invention discloses a high-performance galvanized copper alloy wire rod and a preparation method thereof. The high-performance galvanized copper alloy wire rod comprises a core material and a clad layer. The core material is prepared from the following raw materials of, by weight, 2.3-4.4 parts of germanium, 1.3-2.4 parts of tin, 5-8 parts of lead, 3-6 parts of nickel, 1-4 parts of tungsten, 1.3-5.1 parts of silver, 2.1-5.2 parts of chrome, 2-4 parts of aluminum, 30-50 parts of copper, 2-6 parts of cobalt, 4-11 parts of molybdenum, 1.2-4.4 parts of neodymium, 3.3-3.5 parts of cerium, 2-4 parts of carbon and 10-12 parts of thermal conductive fillers. According to the high-performance galvanized copper alloy wire rod and the preparation method thereof, the corrosion resistance of a wire in machining fluid is increased, the cutting performance of the wire is improved significantly, and the obtained wire has the stable tensile strength; the wire rod is provided with a certain copper-zinc alloy layer, so that the gasification temperature is increased, and more heat is conducive to being taken away; the operability is high; the preparation steps are few; the production equipment is simple, therefore, products meeting the requirements are prepared easily, and the large-scale production and the automatic production are achieved easily.