The invention relates to the technical field of feed processing, in particular to a plant-derived feed, and a preparation method and application method thereof. The plant-derived feed is mainly prepared from raw materials of salvia japonica, origanum vulgare, coriandrum sativum, origanum majorana, metaplexis japonica, yucca filamentosa, salvia splendens Ker-Gawler, abelmoschus mani-hot, ginkgo biloba, monascus purpureus, sophora japonica Linn, juniperus formosana Hayata, vaccinium vitis-idaea, cirsium japonicum, betaine, garlicin, organic acid, a flavoring agent, microorganisms and the like through the steps of removing impurities, performing thorough cleaning, performing crushing, performing puffing treatment, performing fermentation, performing drying and crushing, performing sterilization and the like. The plant-derived feed is rich in nutrition and good in palatability; the appetite of poultry and livestock can be effectively stimulated, digestion is promoted, and the utilization rate of the feed is increased; the plant-derived feed also has various health-care efficacy of clearing heat, removing toxicity, killing and restraining bacteria, supplementing qi, benefitting essence,stimulating the appetite, activating the spleen, resisting oxidation, invigorating the spleen to promote digestion, promoting blood circulation for removing blood stasis, drying dampness to destroy parasites and the like, besides, also has favorable deodorizing effects, and can improve the living environment of the poultry and the livestock, improve the propagation and production performance, reduce the mortality rate and increase the breeding benefits; and the preparation method is simple, and the plant-derived feed is easy to produce.