This application provides a data storage method which is applied to a data storage device and includes: acquiring a first user identification and first user data of a first user; determining, from at least two preset distributed hosts in different areas, a first identification distributed host corresponding to the first user identification and a first data distributed host corresponding to the first user data; sending the first user identification to the first identification distributed host, so that the first identification distributed host stores the first user identification, and generates and stores a first identity identification corresponding to the first user identification; receiving the first identity identification; and sending the first identity identification and the first user data to the first data distributed host, so that the first data distributed host stores them in an associated manner.