The invention discloses a method for preparing an astaxanthin extractive from haematococcus pluvialis powder. The method comprises the following steps: (1), weighing haematococcus pluvialis powder, adding food-grade alcohol, fully and uniformly mixing to obtain a mixture as a reaction system, and extracting the reaction system for 1 to 2 hours at a room temperature in a dark place, wherein the ratio of haematococcus pluvialis powder to food-grade alcohol is 1 g/10-20 mL, and the food-grade alcohol adopts a food-grade alcohol solution with the volume concentration of larger than or equal to 95%; (2), centrifuging after extraction is finished to respectively obtain residue and supernatant liquor; (3) replacing the haematococcus pluvialis powder obtained from the step (1) with the residue, and repeating the step (1) and the step (2) at least once in sequence; and (4), combining the supernatant liquor obtained from the step (2) and the supernatant liquor obtained from the step (3), and recovering alcohol through vacuum concentration to obtain a dark red extract, namely the astaxanthin extractive. The astaxanthin extractive, prepared by the method, has the characteristic of high content of the astaxanthin monomer.The invention discloses a method for preparing an astaxanthin extractive from haematococcus pluvialis powder. The method comprises the following steps: (1), weighing haematococcus pluvialis powder, adding food-grade alcohol, fully and uniformly mixing to obtain a mixture as a reaction system, and extracting the reaction system for 1 to 2 hours at a room temperature in a dark place, wherein the ratio of haematococcus pluvialis powder to food-grade alcohol is 1 g/10-20 mL, and the food-grade alcohol adopts a food-grade alcohol solution with the volume concentration of larger than or equal to 95%; (2), centrifuging after extraction is finished to respectively obtain residue and supernatant liquor; (3) replacing the haematococcus pluvialis powder obtained from the step (1) with the residue, and repeating the step (1) and the step (2) at least once in sequence; and (4), combining the supernatant liquor obtained from the step (2) and the supernatant liquor obtained from the step (3), and recovering alcohol through vacuum concentration to obtain a dark red extract, namely the astaxanthin extractive. The astaxanthin extractive, prepared by the method, has the characteristic of high content of the astaxanthin monomer.