第三人撤销之诉制度自设立以来受到诸多争议。很多学者对其持消极态度，认为第三人撤销之诉在我国无法适用或适用空间有限。我国《民事诉讼法》规定第三人撤销之诉的原告必须是有独立请求权第三人和无独立请求权第三人。从理论上来说，这个主体规定极大地限制了第三人撤销之诉在我国的适用。而且在实践适用中，第三人撤销之诉也存在缺少诈害第三人、法律关系认定标准不统一、必要共同诉讼人的错用、缺少类似必要共同诉讼人等问题。适用存在困境导致第三人撤销之诉很难实质上发挥作用，实现救济第三人和防治虚假诉讼、恶意诉讼等制度目的。 本文欲先对第三人撤销之诉的规定分别进行理论分析和实践应用分析，发现并讨论存在的问题，以第三人撤销之诉的目的为出发点，对现有法律条文进行目的解释，以实现对第三人撤销之诉原告适格条件的完善和重构。 本文围绕第三人撤销之诉原告适格展开研究，分为以下几个部分： 绪论部分阐述了该制度的基本情况。 第一章将从理论上对原告适格条件进行分析。先从主体本身分析有独三和无独三。除此之外，还对原告适格的非主体本身的三个条件进行分析：非因自己原因未参加诉讼或未被充分代表、其民事权益因生效裁判文书遭到损害以及穷尽了常规救济手段或未充分救济。 第二章将从实践角度出发。通过在案例网站检索相关案件判决书，了解第三人撤销之诉在我国运行的大概情况。然后通过几个案件和案例分析第三人撤销之诉在运行中存在的问题。 第三章将以目的解释为方法，以法律目的为导向，意图对我国第三人撤销之诉的适格原告规定进行重构。

The suit of the third party discharging the judgment (the “System”) has been controversial since its establishment. Many scholars have a negative attitude towards the System, and believe that it is not applicable or limited in China. According to China’s Civil Procedure Law, the plaintiff of the System must be the third party with independent claim right or the third party who has a legal interest in the preceding case. In theory, this subject stipulation greatly limits the application of the System in China. There are some problems in practice, such as the lack of fraudulent third party, the inconsistent standard of legal relationship identification, the misuse of necessary joint litigants, and the lack of similar common litigants. The dilemma of application makes the System difficult to come into play and achieve the purpose of providing relief to third parties and preventing false litigation and malicious litigation. This paper wants to conduct theoretical analysis and practical application analysis on the System, and discuss the existing problems. Starting from the purpose of the third party's revocation and interpreting the existing legal provisions, this paper wants to achieve the perfection and reconstruction of the plaintiff's eligibility conditions for the System. This paper will be divided into the following sections: The introduction part is introduced in the basic situation of the System. The first part will analyze the legal provisions of the System. The second part will start from a practical perspective. Through the search of relevant case judgments on the case website, this part will analyze the general situation of the System in China. Then through several cases and cases, this part will analyze the problems in the operation of the System. The third part will aim at the purpose of the law, and intend to improve and reconstruct the plaintiff's eligibility conditions for the t System in China.