The invention relates to a fodder additive for piglets and a preparation method and application of the additive and belongs to the field of fodder. The raw materials of the fodder additive comprise life power complexation ionized water, wheat germ flour, catechin, stevioside, lactulose, whey powder, lactic acid bacteria, cysteine, histidine and a carrier. The fodder additive is low in price, all raw material components are used after cooperation, and the effect is good and stable. According to the preparation method, all the raw materials are mixed according to a proportion, the method is easyand quick to use, and the condition is good in controllability. The fodder additive is added to fodder for piglets so that microelements required by piglet growth can be supplemented, the high utilization rate is maintained, the body life energy of the piglets is activated, the flora balance of the gastrointestinal tract of the piglets is maintained, the absorption digestion ability is improved,and the feed intake and conversion rate of the fodder are increased.