定金是我国担保法所规定的一种担保方式,也是违约当事人违反合同的一种责任形式,定金在法学理论和法律实务中具有非常重要的地位。文章主要从立约定金、违约定金、解约定金来讨论定金的性质。 The deposit is a kind of guarantee provided by the guarantee law in our country. It is also a form of responsibility of breach of contract by the breaching party. The deposit has a very important position in the legal theory and legal practice. The article discusses the nature of the deposit mainly from the contract deposit, the default deposit and the contract deposit.