In the post-maintenance of software application, the change of business logic layer occupies the majority, but some traditional development frames, for example structs, spring and so on, which based on MVC pattern has only realized the model-view-control solution coupling, however the business also has the close coupling relations in the business logic layer. If a change happens in the module, that will cause a chain-like reflection and a series of related modules change. This article uses the business case report as an example, which achieved the business component transfers and the business component visits indirectly, separated the business functions from business logic, so constructed an extension strong, easy to maintain and configure nimble module in business logic layer.