Haiying rapeseed oilhaslipid-lowering and enhance immunityeffect，In order to develop and exploit Haiying rapeseed oil，Its physical and chemical properties and chemical composition were studied.Using GC/MS and other methods to analyze physical and chemical properties and composition of Haiying rapeseed oil.The results show：Haiying rapeseed oil acid value，peroxide value，saponification value，iodine value，respectively 4.45 mg/g、6.08 meq/kg、188.38 mg/g、117.4 g/hg；Haiying rapeseed oil does not contain alkaloids and flavonoids；Also contains thirteen kinds of unsaponifiables.Haiying rapeseed oil contains thirteen kinds of fatty acid composition，the highest content of linoleic acid，oleic acid，palmitic acid，respectively70.98%、17.63%、7.82%.