摘要：合同履行期限到来之前，为了更好地保护债权人的利益，我国《合同法》特设立了不安抗辨权制度。目的是维护交易秩序，保障交易安全，对该项法律制度本身以及与其相关的理论进行深入的比较研究，对正确贯彻和运用不安抗辩权有着积极的意义。不安抗辩权的法律基础是基于双务合同双方义务的牵连性,它与同时履行抗辩权、情事变更原则、预期违约制度既有联系又有区别。我国不安抗辩权的规定吸收了英美法系预期违约制度中的合理成分,有自己的特色。它同预期违约存在一定的衔接与交叉，然而我国《合同法》上的不安抗辩权制度具有一系列优点的同时，也存在一些不足之处。

　　　本文试图通过对不安抗辩权制度的法律效力、价值的研究，通过阐述不安抗辩权制度的渊源、发展前景，结合我国实际情况，对有中国特色的不安抗辩权制度进行探讨、对比，试对其中存在的问题，有针对性的进行分析，从而提出、形成自己个人的观点和看法。

关键词：不安抗辩权概念  适用条件  预期违约  不足与完善

Abstract:Performance of the contract deadline, in order to better protect the interests of creditors, China's "Contract Law" has set up a system of defenses against anxiety. The purpose is to maintain trading order, and ensure the security of the legal system itself and the associated theory, in-depth comparative study on the correct implementation and use of the right to Plea has a positive meaning. Disturbed by the legal basis for defense of the right is based on the dual-service obligations of the contracting parties involved nature of it while performing defense rights violations change the principle, is expected to breach the system and there are differences between both. Disturbed by the provisions of China's defenses absorbed the common law system is expected to breach the reasonable elements has its own characteristics. It is expected to breach of contract with a certain degree of convergence and cross, but China's "Contract Law" on the Right to Plea system has a series of advantages at the same time, there are some shortcomings.

　　　This paper attempts to defend the right of the system by disturbing the legal effect of the value of research through the elaborate system of defenses anxiety origin, development prospects, combined with China's actual situation, uneasy with Chinese characteristics, system of defenses, contrast, trial of which problems, targeted analysis, which suggested that the formation of his own personal views and opinions.

Key Words：Concept of the right to Plea  Applicable Conditions  Anticipatory breach of contract  Inadequate and improvement of