《合同法》第五十二条规定了我国无效合同制度。从法条的规定来看,本制度存在诸多问题,如国家利益与社会公共利益的界定、合同形式与合同目的问题等。针对上述问题,笔者在本文中作出如下论述。 Article 52 of the Contract Law stipulates an invalid contract system in our country. Judging from the provisions of the law, there are many problems with this system, such as the definition of national interest and social public interest, the form of contract and the purpose of the contract. In response to the above problems, the author made the following discussion in this article.