The present invention relates to a seal oil based lipid emulsion injection, and the main ingredients of which contains 190-210 g / l of refined OMEGA3 seal oil, 11-13 g / l of refined lecithin, 24-26 g / l of glycerol for injection, and balance amount of water. The preparation of the seal oil based lipid emulsion injection comprising the steps of stir and dispersion, high-pressure homogenization, vacuum filtration, antisepsis and encapsulation. The OMEGA3 seal oil lipid based emulsion injections have high content of energy, and thus are highly absorbable to human body, and can not only provide human body with caloricity, but also supply the fatty acids necessary for human body, and can enhance body's immunizing ability, reduce the content of cholesterol, adjust the blood concentration and then be used for anti-inflammation, in particular, it is highly useful for a postoperative patient to restore his strength.