Mapping table reconstruction method and data storage device

The invention discloses a mapping table reconstruction method and data storage equipment, and belongs to the technical field of storage. The mapping table reconstruction method comprises the following steps that a first cache and a second cache are configured in a controller, the first cache stores a logic address to a physical address mapping table during reconstruction, and the second cache stores a physical address to a logic address mapping table during reconstruction; reconstructing the logic address to the physical address mapping table, and outputting the flash memory block and the next block of the last block participating in the reconstruction of the logic address to the physical address mapping table; rebuilding the mapping table from the physical address to the logic address according to the flash memory block and the block which are output after the mapping table from the logic address to the physical address is rebuilt; and retaining a part of the first cache and a part of the second cache which