The invention discloses a method for extracting
astaxanthin from
haematococcus pluvialis. The method comprises the steps of (1) breaking walls of sporophore: taking fresh wet
algae mud, adding 3 mol / L HCl with an amount of two times by
mass of the fresh wet
algae mud, stirring uniformly, stirring for 3 min at a temperature of 50 DEG C with a stirring speed of 180 times per minute, cooling rapidly, centrifuging and washing and taking the
algae bodies; and (2) extracting
astaxanthin: adding
ethanol into the wall-broken sporophore with an amount of two times of the sporophore, oscillating for 5 min at a low temperature of 10 DEG C, centrifuging, recovering
ethanol, repeating for 2 times, merging the recovered
ethanol; concentrating at a low temperature and in vacuum; and recovering ethanol by
evaporation, and thus the left material being
astaxanthin. The method is simple and can be easily understood, is reasonable in operation, enables the
haematococcus pluvialis to perform nutritive growth relatively well, is relatively fast in transformation from nutritive growth to non-nutritive growth, and accumulates relatively much
haematococcus pluvialis, thereby increasing efficiency and stability of culture, transformation and accumulation and effectively preventing
contamination of miscellaneous algae during a culture process. The manufactured astaxanthin is relatively low in cost.