最佳证据规则曾是英国普通法上最为古老的证据规则之一。作为普通法传统上的证据规则之一，最佳证据规则的实质内涵是：某一特定的有关案件事实，只能采取能够寻找到的最为令人信服和最有说服力的有关最佳证据方式予以证明。①我国民事诉讼证据规则中将最佳证据规则定义为：人 Best evidence rules were one of the oldest common-law rules of evidence in Britain. As one of the traditional rules of evidence in common law, the essence of the best evidence rule is that the most convincing and persuasive one about the best form of evidence that can be found is found in a particular case. To prove it. ① China’s civil lawsuit evidence rules will be defined as the best evidence rules: people