Computer　forensics　is　an　important　part　of　the　computer　crime　investigation.　So　a　Forensics　system　aimed　to　Foxmail　data　analysis　and　investigation　is　proposed　in　this　paper.　The　system　can　index　the　email　data　based　on　Lucene　technology　and　the　MMSeg　participle　algorithm,　and　provides　the　full　text　retrieval　of　the　email　content　function.　Subsequently,　a　visual　communication　graph　would　be　generated　according　to　the　retrieval　results.　Based　on　the　communication　graph,　an　algorithm　on　graphic　structure　analysis　is　proposed,　and　by　means　of　centrality　and　minimum　traffic　filtering　method,　multilevel　analysis　is　carried　out　on　the　graph,　which　can　detect　the　possible　suspicious　personnel　and　their　relationships　and　provide　strong　support　for　the　computer　crime　investigation.