The present invention discloses a blood lipid-reducing composition, the active components of the composition are composed of fish oil, linseed oil, phytosterol ester or phytosterol. The composition mainly comprises components such as a-linolenic acid, EPA, DHA and phytosterol or phytosterol ester, can reduce serum total cholesterol (TC), triglyceride (TG) and low-density lipoprotein cholesterol (LDL-C), has an efficacy of reducing blood lipid. The present invention also discloses the use of the blood lipid-reducing composition in the manufacture of health food having a function of reducing blood lipid.