The　lack　or　incorrect　implementation　of　storage　device　privacy　and　secret-related　information　erasure　methods　will　cause　serious　security　risks　for　personal　privacy　and　national　construction　security.　Although　information　erasure　based　on　overwrite　for　magnetic　storage　media　is　relatively　mature,　it　is　difficult　for　these　mature　technologies　to　be　directly　used　in　the　currently　widely　used　NAND　flash　memory　due　to　its　complex　structure　and　other　reasons,　and　its　security　is　in　doubt.　The　recycling　industry　of　waste　electronic　equipment,　mainly　smart　phones,　is　facing　the　problem　of　lack　of　information　security　clearance.　In　addition　to　the　hidden　dangers　of　information　security,　this　situation　also　leads　to　the　low　recovery　rate　of　waste　electronic　equipment,　which　leads　to　potential　waste　of　resources　and　environmental　pollution.　In　view　of　the　above　problems,　this　article　reviews　the　information　erasure　for　NAND　flash　based　on　the　overwrite　technology　to　support　the　in-depth　research　of　the　information　erasure　technology.　At　first,　it　introduces　the　definition　and　classification　of　information　erasure.　Then,　the　characteristics　of　NAND　flash　memory　is　analyzed.　Thirdly,　it　summarizes　the　information　erasure　technology　based　on　overwriting.　And　the　research　difficulties　and　application　difficulties　of　information　erasure　technology　for　NAND　flash　memory　is　discussed　and　analyzed.　Finally,　conclusions　and　prospect　the　future　research　direction　of　overwrite-based　information　erasure　technology　for　NAND　flash　are　given　out.