More and more organizations and individuals outsource their data storage into cloud and using cloud-based services provide data management, then lead to the combination of database and cloud environment, which prompted changes in the information industry and information service, while there exits any security issues. Query providing user capabilities of accessing cloud data and obtaining information. Thus, how to protect both privacy of user queries and data privacy, and how to reduce overhead in the case of rapid query becomes a hot issue. The database protection mechanisms proposed in this paper are based on attribute decomposition and encrypted cloud environment, which not only the server to minimize the number of encryption and decryption of the attribute field, but reduce the amount of computation and effectively encrypt the data of database as well.