刑事证据“主体不能证”是指在刑事诉讼中,不合法主体收集、提供的证据材料不能作为证据使用,也就是不合法主体收集、提供的证据材料不具备证据资格,其没有证据能力,也就没有证明效力。“主体不能证”包括取证主体不能证和作证主体不能证两个方面。它作为我国刑事诉讼法规定的非法证据与内容不能证、形式不能证、违法不能证一样并列成为我国刑事诉讼中应予排除的证据。但是,在司法理论上,尤其是司法实践中,对“主体不能证”研究不多、重视不够,往往自觉与不自觉地将“主体不能证”的证据材料,或视而不见,或根本没有发现,或作为 Criminal evidence “subject can not be card ” refers to the criminal proceedings, the illegal body to collect, provide evidence can not be used as evidence, that is, illegal entities to collect, provide evidence that the material does not have the evidence, it has no evidence of capacity , There is no proof of effectiveness. “Subject can not be card ” includes the forensic evidence of the main body and the main body of the certificate can not be two aspects. As evidence of the illegal evidences and contents stipulated in the Criminal Procedure Law of our country, it can be excluded from the criminal lawsuits in our country in the same way as the forms of non-card and illegal ones. However, in the judicial theory, especially in the judicial practice, the research on the “Inadequate Certificate of Subject” has not been studied much and has not been paid enough attention. The evidence materials of “Invalid Subject” can be either consciously or unconsciously ignored, or Did not find, or as