The invention belongs to the field of feeds, and discloses a seaweed-containing composition. The seaweed-containing composition comprises seaweed, probiotics and enzymes, wherein the probiotics are selected from one or more of bacillus subtilis, clostridium butyricum, endospore-forming bacteria, lactic acid bacteria and beer yeast; and the enzymes are selected from one or more of xylanase, glucanase, cellulase, acid phosphatase, phytase, protease, amylase and lipase. The invention further discloses the seaweed-containing feed. The seaweed-containing feed comprises the following components in parts by weight of 30-80 parts of corn, 10-40 parts of soybean meal, 4-30 parts of the seaweed-containing composition, 1-8 parts of fish meal, 0.5-3 parts of soybean oil, 1-2 parts of calcium hydrogen phosphate, 0.1-2 parts of calcium carbonate, 0-0.5 part of lysine, 0.1-0.5 part of table salt, 0-2 parts of citric acid and 0.5-2 parts of an additive. According to the feed disclosed by the invention, antibiotics are not added, so that after the feed is used for feeding sows and after piglets take in milk of the sows, the diarrhea situation of the piglets can be reduced, the survival rate is high and the growth speed is high.