Abstract: In order to overcome the defects such as low security resulting by both using the same key for sending and receiving, the depth encryption mechanism was introduced, and taking it coupling the AES algorithm to propose the secure storage system of cloud computation based on the encryption mechanism. Basing on the analysis of previous research on the security of cloud storage, the symmetric encryption for the user data was used in the client, when the data reached the cloud resource management device, the method of distributed restructuring was used to operate depth encryption; and the security storage structure of “initial encryptiondepth encryption” was constructed; and then the encryption and decryption process of data safety storage was finished. Based on the eclipse simulation platform, the design and implementation were done for the cloud computing security module. The results showed that the encryption efficiency and security of this system was high and simple interface.