Abstract: This paper describes an encrypted storage method based on the virtual file system.We design and implement a virtual file system through the file system development technology.Virtual file system regards a binary file as virtual disk,and can access the data on the virtual disk.In order to ensure the security of the file in virtual disk,we integrate encryption engine,key management and hardware binding modules into virtual file system.This security storage technology is easy to use,and can provide efficient real-time encryption / decryption measures,so it has practical value.