In　TCG　trusted　storage　specification,　weak　identification　verification　of　password　authentication　and　the　lack　of　key　protection　mechanism　are　two　problems.　In　this　paper,　the　authors　put　forward　a　key　management　model　of　hard　disk　based　on　TPCM.　Based　on　the　model,　the　schemes　of　bidirectional　authentication　and　authorization　data　protection　are　proposed　to　address　the　problems　of　identity　authenticity　and　key　confidentiality.　And　the　credibility　and　safety　of　key　management　of　trusted　disk　have　been　improved.