The invention discloses a high-strength spring wire of a high-elastic modulus and a preparation method thereof, and belongs to the technical field of high-strength spring wire technologies. differentproportions are carried out through raw materials relatively and easily obtained, forging and hot rolling are carried out after vacuum smelting and self-consumption smelting, finished sizes are obtained through cold-drawing by different deformations and heat treatment process, and the spring after enwinding is subjected to heat treatment to obtain spring parts with excellent performance. The high-strength spring wire of the high-elastic modulus has the advantages that the operation is simple, the cost is low, the combination property is excellent, and the high-strength spring wire of the high-elastic modulus can be used for other spring parts with strict environmental requirements; and the preparation method is simple in operation, energy saving and environmental protection are achieved, and the preparation method is suitable for industrial mass production.