Disclosed are a data encryption method, a data query method, a data encryption apparatus, a data query apparatus, a device and a storage medium. The data encryption method comprises: acquiring a plaintext keyword of a plaintext file, and creating, based on the plaintext keyword, a file index of the plaintext file using a locality sensitive hashing function; acquiring a first random user key sent by a key management center; using the first random user key to respectively encrypt the plaintext file and the file index to acquire an encrypted file and an encrypted index; and sending the encrypted file and the encrypted index to a server side to instruct the server side to encrypt the encrypted file using a first random server side key sent by the key management center, so as to form a ciphertext file, wherein the first random user key is associated with the first random server side key. The data encryption method reduces the storage pressure of a system and improves the data security.