The invention relates to the field of microalgae
active component extraction, and discloses a method for extracting fucoxanthine and
polyunsaturated fatty acid from microalgae and an extracted product thereof, the method comprises the following steps: S1, carrying out first extraction on the microalgae by using a low-concentration
alcohol solution, and carrying out
solid-liquid separation to obtain a first
algae cake and a first extracting solution; and S2, carrying out second extraction on the first
algae cake obtained in the step S1 by using a high-concentration
alcohol solution, and carrying out
solid-liquid separation to obtain a second
algae cake and a second extracting solution. According to the method, the low-concentration alcoholic solution and the high-concentration alcoholic solution are matched for extraction, the method is simple, efficient, low in cost and suitable for large-scale production, the problem of residues of toxic solvents such as n-
hexane is avoided, the alcoholic solution can be recycled, the proportion of the low-concentration alcoholic solution and the high-concentration alcoholic solution in a final finished product is close to that in natural microalgae cells, and the method is suitable for large-scale production. And the composition does not need to be compounded again.