The invention discloses a Guichang Chinese gooseberry additional fertilizer and a preparation method thereof. The additional fertilizer comprises the following components in percentage by weight: 53.65-74.75 percent of organic fertilizer, 8-12 percent of nitrogen fertilizer, 6-12 parts of phosphorus fertilizer, 10-16 percent of potassic fertilizer, 0.25-1.0 percent of boron fertilizer, 0.5-0.25 percent of calcium fertilizer, 0.25-1.0 percent of magnesium fertilizer, 0.05-0.2 percent of iron fertilizer, 0.1-0.6 percent of zinc fertilizer and 0.1-0.6 percent of selenium fertilizer. The preparation method comprises the following steps: weighing the components, grinding, screening, and fully mixing; screening the obtained mixture to prepare the powder, screening, drying, finally packaging, thereby obtaining the product. The fertilizer need rule of the Guichang Chinese gooseberries and the requirement on needs of trace elements caused by the Guichang Chinese gooseberries are combined, the trace elements are properly added, the economic benefits, nutritional quality, flavor quality and storage quality of the Guichang Chinese gooseberries can be improved, the accumulation of beneficial elements is increased, and the accumulation amount of heavy metal elements in the fruits is reduced.