A framework based on domain model and component composition is presented

in which domain models can be used to capture the static business requirement

describe the static relationship between two business objects.The domain application framework describes commonness and provides variety extension

in this extension all kinds of components can be integrated into the system.In this way

a new system can be built and the user requirements can also be needed.Results show the framework is capable of find the commonness and variety and make use of them

and the software quality can be improved.