The invention discloses a feed for ewe in suckling period and a preparation method thereof. The feed is prepared from the following raw materials in parts by weight: corns, maize straws, chrysanthemum straws, black bean powder, shrimp shell meal, cortex acanthopanax rradicis, milkvetch roots, suberect spatholobus stems, all-grass of intermediate peashrub, sunflower cake, wheat germ, climbing fig receptacle, hylocereus undulatus britt flowers, table salt, urea and a compound additive. According to the feed, feed particles are fine and uniform, have green color and luster, has faint scent and balanced nutrition, and are compile with addition of acanthopanax barkfunctional, radix astragali, suberect spatholobus stems and other functional components, so that the immunity of the ewe is improved, the stress reaction is alleviated, the milk production of the ewe is promoted, the milk yield is increased, and the survival rate of fed lams is increased; straw materials are subjected to ammonification, and then the straw materials subjected to ammonification are subjected to lactic acid fermentation and combined processing, so that the feed digestibility is improved, and the feed palatability is improved.