合同管理主要是针对合同在拟定时起至合同履行结束止的全过程的监督、审查 ,防止自己违约和避免对方反索赔的管理工作。合同必须以书面形式表达。合同必须具备四项原则 ,即 :平等互利原则 ,协商一致原则 ,等价有偿原则。合同的签订应具备法定的形式和手续 ,如公正、鉴证、登记或审批手续 ,订约人的权限不得超越法人授予的权限 ,合同所确定的经济活动必须符合国家法律、政策和计划要求 ,使合同成为有效合同 Contract management mainly aims at supervising and examining the entire process of the contract from the time of formulation to the end of the contract performance, preventing one’s own breach of contract and avoiding the counter-claims management of the other party. The contract must be in writing. The contract must have four principles, namely: the principle of equality and mutual benefit, the principle of consensus, the principle of equal payment. The signing of the contract should have the statutory form and formalities, such as fairness, authentication, registration or examination and approval procedures. The rights of the contracting party shall not exceed the rights granted by the legal person. The economic activities stipulated in the contract must conform to the requirements of the state laws, policies and plans. The contract becomes a valid contract