论无效合同的法律形式

无效合同是相对于有效合同而言的．指合同虽然已经成立，但因其在内容和形式上违反了法律、行政法规的强行性规定和社会公共利益，因此被确认为无效。正确认识无效合同的种类，对于公民、法人正确地使用合同．维护自身的合法利益，从而确保合同法的正常运作、保障经济生活中的交易安全、维护国家利益、准确适用法律、正确处理案件，都具有十分重要的意义。

On the Legal Form of Invalid Contract

Invalid contract is called just opposite valid contract, it means though the contract is established, its contains and form violate law, the compulsory regulation of administrative law and social public interests, then is determined invalid. Understanding correctly the kinds of invalid contract is of significance to ensuring the operation of Contract Law, safeguarding the sefety of business in econormic life, maintaining contry＇ s interests, applying correctly law and correctly handling cases.