The invention provides a grass carp feed and a manufacturing method thereof, and belongs to the technical field of husbandry. The grass carp feed is prepared from fermenting corn flour, rice bran, cottonseed cake flour, green grass dry powder, brewer's grain, kelp powder, coconut shell powder, shell powder, table salt, plant additive, cellulose, ferric phosphate, cuprous iodide, cobalt chloride, and manganese gluconic acid, wherein the plant additive is prepared from houttuynia cordata, cyrtomium fortune, angelica decursiva, euphorbia humifusa willd, sanguisorba officinalis, and wild chrysanthemum flower according to the ratio of 1-3: 0.7-0.9: 1.5-1.8: 0.6-0.8: 0.3-0.5: 1-1.5. The prepared feed is good in palatability; the utilization rate of the feed is improved, and sufficient nutrition is provided for the growth of grass carp fry; the morbidity of the fry is reduced, and the survival rate of the fry is improved.