Abstract: OBJECTIVE To study the feasibility of prudent expansion of some sources of Chinese medicine in the legal standards. METHODS Some varieties in Chinese Pharmacopoeia and Zhejiang Province Standards of Processing Chinese Crude Drugs were mainly analyzed and summarized. RESULTS Some varieties that existed in the historical evolution, the varieties that were mainly circulated in the market, the varieties that were difficult to identify, and the varieties that could be replaced the endangered species, etc, could be used as an expanding source of Chinese medicine. CONCLUSION On the basis of focusing on the identification of basic sources and the study of pharmacology and efficacy, it is feasible to cautiously expand the sources of some Chinese medicine in legal standards.