[Purpose/significance]According to the problem of independence of think tanks,this paper puts forward that independent think tanks contain many aspects,so the superficial independence could not cover up the hidden political purpose,which is to provide references for government decision-makers. [Method/process] Through using methods of theoretical deduction and literature study,the paper analyzes the present situation of the independence of the American think tanks,probes into the reasons for the independence of the American think tanks,analyzes the defects existing in the independence of the American think tanks,and reflects on the root of the defects of the independence of the American think tanks. [Result/conclusion] The paper thinks that the independence of American think tanks reflects hidden political motivations. It is necessary for government policy makers,the media,the public,and supervision institutions to keep alert to think tank research.