MDB file fragment recovery method and device

The invention belongs to the technical field of information security and computer application, and particularly relates to an MDB file fragment recovery method and device. The method comprises the following steps of: S1, obtaining a corresponding head file fragment set H through head characteristics of an MDB file; S2, analyzing MSysObjects system table data pages to obtain indexes of definition pages of all the tables; S3, matching fragment pages of head file fragments Hi, and analyzing different pages to obtain associated page indexes; S4, judging whether the head file fragments Hi are complete or not, if the judging result is no, jumping to step S3, and if the judging result is yes, jumping to step S5; S5, judging whether the MDB file is complete or not according to an internal structure of the MDB file, if the judging result is yes, jumping to step S8, and if the judging result is no, jumping to step S6; S6, judging whether a page according with the structure of the MDB file exists in free pages or not, i