The present invention relates to the technical field of aquaculture feeds, particularly to a clarias fuscus feed and a preparation method thereof, wherein the clarias fuscus feed is mainly prepared by fermenting 15-20 parts of cardamine hupingshanensis, 14-16 parts of shuanggouhuangqi, 15-17 parts of shamowangyu, 13-15 parts of moringa leaf, 13-15 parts of brassica alboglabra, 13-15 parts of wheat germ, 8-10 parts of beet, 8-10 parts of fragrant bulbophyllum, 6-9 parts of mushroom, 5-7 parts of peanut meal, 5-7 parts of soybean meal, 4-6 parts of eggshell, 2-3 parts of honey, 7-10 parts of silkworm chrysalis, 7-10 parts of meat, 5-7 parts of fly maggot, 5-7 parts of tenebrio molitor, 5-7 parts of blood powder, 3-4 parts of selenomethionine, 3-4 parts of selenocysteine, 1-2 parts of yeast selenium, and other raw materials. The preparation method comprises: raw material treatment, mixing, fermenting, and other steps. The clarias fuscus feed of the present invention has advantages of rich nutrition, clarias fuscus nutrition value increasing, high selenium content, clarias fuscus weight increasing, and breeding benefit increasing.