关键词：合同形式欠缺 合同成立 合同强制 成立要件
Abstract ：Form of contract, is the external manifestation of the parties agree, is the contents of the contract carrier. Form of contract is from the types of points. There orally, in writing; from the legal form of the points, there are two kinds of legal forms and contract forms. Form of the contract system, the mission is to the prosperity and economic development, and fully guarantee the security, maintenance of trade stability, and promoting trade efficiency and maximize both parties to the contract and the balance of public interests. Form of contract is essential for the establishment of the contract. When dealing with practical problems it is necessary to pay attention to the form of contract and parties to the contract have to take into account the balance of public interests. Discern the nature of the form of contracts, lack of understanding of the contract in the form of the contract set up to properly handle the contract between the force and freedom of contract relations, improve the judiciary in dealing with the lack of means of contract forms. Enable us to deal with the contract in the form of contract is established when the lack of practical problems is more handy.
Key words: Lack of form of contract ，Establishment of the contract，Contract enforcement ，Essential Elements...