Data deletion and historical record recovery method and device based on SSD mapping table

The invention provides a data deletion and historical record recovery method and device based on an SSD mapping table, and the method comprises the steps: reading all Flash blocks used for storing the mapping table on the SSD, recording the Flash blocks as mapping table blocks, and sorting the mapping table blocks according to a sequence; sequentially extracting all mapping records of all logical addresses LBAs on the Bank from each Bank from old to new according to the sequencing sequence of the mapping table; extracting the latest mapping record from each Bank, recombining SSD hard disk data, and taking one historical mapping record of each Bank as a primary rollback state; when the historical editing records of the file are recovered, the sector map of the file is analyzed to calculate Bank blocks where all LBAs of the file are located, all historical mapping records of all Bank blocks where the file is located are taken out, the mapping records of all Bank blocks are ranked, each mapping record correspond