Object-oriented Paradigm is the basis of software reuse. The article probed into the OOP(object-oriented paradigm)on the basis of definition of software reuse. Then

the definition of software component is derived and analyzed:It has many special advantages such as encapsulation and inheritance;It is composed of component and technology introduction which described its function. It has broader applications than class in future. At last

the software development method and principle are derived on the basis of software reuse technology.