Inorganic molecules have seldom been included into cyclodextrin crystal. Here in this paper we report the first example of including CdS quantum dots into cyclodextrin crystal by simple rapid crystallization. A CdS quantum dot/cyclodextrin composite has been obtained, in which quantum dots of CdS are embedded in beta-cyclodextrin (beta-CD) crystal. Experiments have proven that it is the rapid crystallization of cyclodextrin in acetone that results in the formation of abundant cyclodextrin nuclei, which include CdS dots into them forming the CdS quantum dot/cyclodextrin compostie. This research opens the new research held of inorganic species/cyclodextrin inclusion complex. (C) 2014 Elsevier B.V. All rights reserved.