The invention relates to a data storage method and device as well as a mobile terminal. The data storage method comprises the following steps: acquiring interference data corresponding to to-be-stored data; partitioning the interference data into multiple first data slots; partitioning the to-be-stored data into multiple second data slots; combining the multiple first data slots and the multiple second data slots to form multiple data combinations; storing the data combinations respectively. According to the method, the to-be-stored data is partitioned into the multiple second data slots and the first data slots for interference are added, so that acquisition of all slots of the to-be-stored data by other people can be avoided, and the data storage security is improved.