合同相对性原则是合同赖以成立的基础的前提,是合同法的理论基础。但是司法实践表明,第三人参与到合同关系中来的案例越来越多,形成对合同相对性原则的一种突破。因此,本文中笔者通过相对性原则的理论基础和例外规定的探讨,来挖掘其突破的必要性。 The principle of contract relativity is the premise of the foundation of the contract and the theoretical basis of the contract law. However, judicial practice shows that more and more people are involved in the contractual relationship with third parties, forming a breakthrough in the principle of the relativity of contracts. Therefore, in this article, the author explores the necessity of its breakthrough through the theoretical basis of the principle of relativity and the discussion of the exception rules.