The study on food safety traceability system in China started from 2002. During the study and implementation, some related standards and guides have been gradually made, many traceable foods and traceable enterprises were created and a series of traceability subsystems were developed. This paper introduces the importance of food safety traceability system construction, the present construction situation in China and the food safety traceability platform by bar code, deeply analyzes the existing problems and puts forward some advices. It shows that a sound food traceability system has been built in China and tends to maturate. It provides the reference for food safety traceability system construction in developing countries.