The invention discloses a novel alloy adjusting ingot and a preparation method. The novel alloy adjusting ingot is prepared from the components in parts: 30-70 parts of lipid powder, 30-70 parts of gamma-aminobutyric acid and 1-10 parts of silicon dioxide, wherein the lipid powder is one or more of glyceryl mono-di-stearate, palmitic acid fat powder and vegetable oil powder. The preparation methodincludes the following steps that step 1, the gamma-aminobutyric acid is crushed; step 2, a product obtained in the step (1) is put into a granulator, the melted lipid powder is added, and granulating is carried out; step 3, the product obtained in the step (2) is passed through a 16-mesh sieve in a whole-granule mode; and step 4, the product obtained in the step (3) is put together with a silicon dioxide agent into a mixing tank, and thorough mixing is carried out for 5-10 minutes. The novel alloy adjusting ingot and the preparation method have a better protection effect on ruminants, and the gamma-aminobutyric acid can be effectively protected from being degraded by microorganisms in rumen, so that the gamma-aminobutyric acid can be released in true stomach or intestine and finally enters small intestine for absorption and utilization; and raw materials are wide and safe in source, and the operation process is simple and easy to learn.