The invention discloses biological feeds for sea cucumber, which comprise the following components by weight portion: vegetable protein accounting for 10 to 20 parts, straws accounting for 30 to 50 parts, bur clover accounting for 10 to 20 parts, pomace and peelings accounting for 10 to 30 parts, pot ale accounting for 5 to 10 parts, zymocyte accounting for 0.02 to 0.05 parts and complex enzyme accounting for 0.02 to 0.05 parts. The sea cucumber biological feeds can resolve polysaccharide substances such as robust fibers to produce low-molecular monosaccharide, hexabiosa and the like, can improve nutritional components of the feeds, can accelerate the feed acidation, can promote vegetable protein to convert to microbial protein nitrogen, can improve the digestion utilization ratio, can reduce feed coefficient, can achieve good food calling performance, and can accelerate the growth rate; the sea cucumber biological feeds contain a great amount of probiotics groups and active enzyme, so that propagation and growth of destructive bacteria, mixed bacteria and putrefying bacteria can be inhibited, water contamination caused by putrefaction of residual bait can be controlled, water environment with sufficient oxygen can be provided to sea cucumber, the immunization and the disease resistance of sea cucumber can be improved, the survival rate is improved, and output benefits can be improved further; in addition, raw materials are abundant and are easy to get, and the cost of the feeds is low.