欧美国家司法实践证明,污点证人豁免制度有其存在的土壤和重要的现实意义。但是,我国未对此制度进行法律规定。本文试图首先对“污点证人”有较为准确的认定,然后认证“污点证人”作证豁免制度的基础,从而为该制度的建立夯实理论基础。在此基础上对我国污点证人制度进行合理的构建。 The judicatory practice in Europe and the United States has proved that the system of exemption of tainted witnesses has its existing soil and its important practical significance. However, our country does not have a legal regulation on this system. This paper attempts to first of all have a more accurate identification of the “stain witness”, and then certify the basis of the “witness-witness” testimony exemption system, so as to lay a solid theoretical foundation for the establishment of the system. On this basis, the system of stain witness in our country is reasonably constructed.