Abstract: Corroboration is a kind of miscellaneous and generalization of various relations among mutual cooperative evidences, and its function has been upgraded from the method of evidence analysis to a mandatory evidence specification, verification itself is not the reason for the occurrence of unjust, false and misjudged cases. Under criminal proof standard of “conclusion being unique”in China, confirmation is a necessary condition to realize this standard. In terms of the relationship between confirmation and free evaluation of evidence, it is a further restriction and supplement to free evaluation of evidence. On the normative level, China's criminal proof mode can be identified as “substantial corroboration”mode, while in practical, it can be treated as the mode of “form corroboration + substantive moral evidence”. So the future reform direction of China's criminal proof mode should be to adhere to the dominant position of corroboration and strengthen the function of free proof at the same time.