The invention discloses forage capable of improving the sperm quality of bulls for breeding. A cultivation method of the forage includes the steps that 1, a planting mode is set, wherein forage seedsand corn seeds are interplanted in a finished field; 2, forage fertilizer is prepared from seaweed powder, peanut cakes, straw, zinc sulfate, zinc gluconate, sodium selenite, selenium yeast, calcium superphosphate, ferrous sulfate, magnesium sulfate, manganese sulfate, fermented fungus powder, sodium alkyl benzene sulfonate, slaked lime, humic acid and hydroxymethyl cellulose; 3, fertilizing and irrigating are carried out, wherein the forage fertilizer is applied once every 10-20 days in the forage and the corn field, and the forage is irrigated once every 1-2 days; 4, harvesting is carried out, wherein when the forage and corn are mature, the forage is harvested, the corn is harvested, and corn stalks are cut and aired to serve as the main raw material of bull coarse feed to be eaten by the bulls. The forage has the advantages that the zinc and the selenium content of the forage is increased, the sperm quality of the breeding bulls is improved, no chemical fertilizer is added, and theforage is environmentally friendly and free of pollution.