针对实际工程项目需求，分析了消失模铸造的特点，运用ＩＤＥＦ０方法建立了消失模设计活动模型，在此基础上，遵循面向对象方法，利用ＥＸＰＲＥＳＳ信息建模语言建立了基于特征的消失模参数化设计系统的信息模型，并阐述了其系统框架及关键技术。 According to the requirement of actual project, the characteristic of lost foam casting is analyzed. The IDEF0 method is used to establish the model of lost foam design activity. On this basis, the object-oriented method is followed, and the characteristic-based parameterization of lost foam model is established by EXPRESS information modeling language Design the system information model, and explain its system framework and key technologies.