The invention discloses a chitosan oligosaccharide and dunaliella salina powder-containing dietary formula for diabetic patients. The diet comprises the following components in parts by weight: 35-45 parts of sea-fish collagen peptide, 2-3 parts of chitosan oligosaccharide, 2-3 parts of dunaliella salina powder, 1-3 parts of selenium-rich rice flour, 9-11 parts of yam flour, 1-3 parts of arabinose, 19-21 parts of polydextrose, 0.5-1.5 part of sucralose, 0.5-1.5 part of edible essence and 0.5-1.5 part of citric acid. Through scientific compatibility, the functions of the components can be fully exerted, so that the chitosan oligosaccharide and dunaliella salina powder-containing diet for diabetic patients has excellent treatment and health effects.