以往文献普遍认为法定证据制度取代主观自由心证制度的原因是为了抑制法官的自由裁量权,而客观自由心证制度替代法定证据制度与“人权法治”思想的产生关系密切。文章在考察中世纪基督教思想尤其是“血罪”观念的基础上,提出了不同的观点,即道德慰藉与事实发现两种不同功能在刑事证明程序变迁的过程中发挥了重要作用。 In the past literature, the reason why the statutory evidence system replaced the subjective freedom testimony system was generally considered to restrain the judge’s discretion, while the system of objective evidence of freedom instead of the statutory evidence system was closely related to the idea of ​​“human rights, the rule of law.” Based on the investigation of medieval Christian thought, especially the concept of “Blood Crime”, the article puts forward different views that moral comfort and fact discovery play different roles in the evolution of criminal proof procedure.