As the form of rational thinking by which the minor premises of judicial syllogism can be obtained, evidential reasoning in the process of the proceedings is a series of inferences made by the judge to find evidence and case facts. It includes two aspects, i.e. the reasoning about evidence, and reasoning with evidence. Its natural characteristic is the logical defeasibility. Two basic models of evidential reasoning, namely the argument-based model, and the story-based model, have different features and effects.