The invention provides an organic trace element additive, and a feed and a preparation method thereof. The organic trace element additive is prepared through the following steps of (1) pretreating palm oil, collagen and soybean oil, and performing mixing so as to obtain a fat mixture; (2) uniformly mixing the fat mixture with calcium carbonate, adding a trace element mixture, and performing sufficient stirring; and (3) performing spray granulation so as to obtain the organic trace element additive.