The Research on the Application of UML Models in the Component-based Test Chen Ping, Chi TongZhu (Department of Computer Engineering, Henan Polytechnic Institute, Nanyang, 473009) Abstracts: Component-based software technology is widely used in software system development, and the guarantee of system quality become more and more important. The characteristics of component-based systems were discussed, and component testing technology based of UML was researched as a whole. The test strategy based on UML was given and the testability of UML diagrams was analyzed in detail. Keywords: Component-based Test, UML Models, Software Testing