Abstract: A method for extracting high-quality krill oil from krill includes the following steps: S1. performing extraction on krill with an organic solvent, and collecting an extracting solution; S2. adding alkaline water to the extracting solution to enable a free fatty acid to form a fatty acid salt to be separated from an oil phase, and performing oil-water phase separation and collecting the oil phase; and S3. purifying the oil phase to obtain the high-quality krill oil. In the present application, the preparation process for krill oil is optimized, organic solvent extraction and alkali refining are ingeniously combined, and process parameters are adjusted and optimized, thereby reducing the acid value of krill oil, and also ensuring the content of active ingredients such as phospholipid and astaxanthin in krill oil to the greatest extent, and improving the quality of krill oil.