table isotope ratio analysis can be used to identify different regions,different food source of animal products.The method is non-radiation,harmlessness,sensitivity and accuracy.Stable isotope ratio analysis technique is an effective tool for tracing the food origin and has broaden application.The paper systematically reviewed the authenticity and development of the method used in meat and diary products at home and abroad.It provides the references of establishing the traceability detecting system of agricultural products in China.