By using the methods of bibliometrics, co-citation analysis, social network analysis, etc, The paper analyzes the international neoplastic stem cells documents cited in SCI-Expanded from the following aspects: distributions of times, spaces, institutions and journals. Research hot spots and tendency, scientific collaboration networks of countries or regions are visualized by the software such as Thomson Data Analyzer (TDA), CiteSpace and UCINET. Further more it puts forward proposals for neoplastic stem cells research in our country.