Abstract: Hi-tech SMEs are the most important part in economic development. However so far for the definition of Hi-tech SMEs does not have yet to unify,and the data of Hi-tech SMEs have not been collected. This has inconvenience for the economic management and theoretical research of Hi-tech SMEs. In this paper we analyze the characteristics of Hi-tech SMEs in quality and quantity, and discuss the definition standard for the Hi-tech SMEs. We hope our work can contribute to the development of Hi-tech SMEs and related management and research.