The invention relates to the technical field of agriculture culture, in particular to a pig raising fermentation bed packing and a preparation method thereof. The packing contains the following components: soil, wheat bran, rice bran, peanut shells, plant straws, soybean meal, sawdust, traditional Chinese medicine components, table salt, and fermentative strains. The preparation method comprises the following steps: (1) crushing the peanut shells, the plant straws, the soybean meal, and the traditional Chinese medicine components respectively for later use; and (2) mixing the components in proportion, adding an appropriate amount of water, and stirring the components uniformly to obtain the fermentation bed packing. The pig raising fermentation bed packing provided by the invention mainly makes use of crop straws and leftovers obtained by agricultural product processing, so that the raw material cost is greatly reduced, the material utilization rate is improved, the animal welfare is improved, and a positive cycle between agriculture and animal husbandry is achieved; and the preparation method is simple and easy to operate, and has a relatively good application value.