原告于第二审程序中为诉之追加不仅关涉被告防御权之行使,更关系到审级利益之维护。故立法关于二审中诉之追加应有特别要件之设定以求原、被告利益之衡平。本文在剖析现行立法与司法解释失范的基础上阐释了二审程序中原告追加新诉应具备之特别条件。 The appealing of the plaintiff in the second instance proceedings not only concerns the exercise of the defense right of the defendant, but also the maintenance of the interests of the trial level. Therefore, the legislation on the second instance appeals should be added to set the special requirements of the original plaintiff, defendants interests balance. Based on the analysis of the current legislation and the misunderstanding of judicial interpretation, this article explains the special conditions that the plaintiff should have in appealing new litigation in the second instance.