The data accessing technology is the core and foundation technology of the community health information systems. In the process of designing the system, the relational database compared with the Caché database from the data model, extensibility, scalability, etc. Study the associated technology about the heterogeneous data sharing with the Caché database. After analyzed the common solution of heterogeneous data sharing then the paper proposed a new data sharing solution, which design a middle proxy server. With the middle proxy, the implementation class completed the uploading and sharing of data access and other functions.