In 2012, the outside third person cancellation of the lawsuit was added into the civil procedure law amendment, but the system didnt complete the important mission given by the legislation. Judging from the current situation of judicial practice, the dilemma of the system mainly lies in the courts rejection of the system, the confusion of the definition of third people, and the confusion with the application of the other third party system. To get rid of the dilemma, in addition to the practical importance of this kind of lawsuit form in suppressing false litigation and malicious litigation, protecting the legitimate rights and interests of a third person, accurately define the eligible subjects that can file the appeal, to litigation in theory as the starting point, to the litigation of litigation and inform system, it is also quite necessary to improve the system of litigation inform, the courts authority notification system. In addition, it is also necessary to differentiate and coordinate the third partys lawsuit against the other third party system.