In the field of international commercial arbitration, the phenomenon of codification of evidentiary rules arises in recent years. The codification reflects the following characters: the form of soft law, actors and participants’width, and active interaction between rules and“best practice”. On the whole, the codification of evidentiary rules is helpful to balance the relationship between efficiency and fairness, between the different legal cultures, and between flexibility and predictability very well. As for whether to make out detailed evidentiary rules, Chinese organizations should adopt prudent attitude. As for the existing evidence rules in international commercial arbitration, Chinese organizations and practitioners should make active research, and apply them to arbitral procedures flexibly.