Wenchuan　Earthquake　happened　in　the　mountainous　area　with　fragile　geological　environment.　Both　internal　and　external　tectonic　stress　accelerate　the　change　of　geological　environment　in　the　disaster　area.　Various　geologic　process　and　hazards　appear　during　the　transfer.　Protection　measures　of　geological　disaster　were　suggested　while　rebuilding　in　this　paper　by　researching　the　reason　and　distribution　characteristics　of　disaster　such　as　surface　rupture,　landslide,　collapse　and　debris　flow,　such　as:　(1)　In　face　of　the　accelerating　changes　in　areal　geological　environment,　control　strategies　should　be　researched　combined　with　capacity　of　ecological　environment　and　social　development.　(2)　In　the　next　few　years,　geological　disaster　will　be　in　a　highly　frequent,　multiple　and　burst　period　because　of　repeated　damage　by　earthquake　and　aftershock.　At　the　same　time,　geological　environment　will　also　be　shocked　by　external　load.　Geological　disaster　risks　around　the　town　which　is　in　southwestern　high　intensity　mountains　should　be　comprehensively　inspected　and　estimated.　(3)　The　environment　and　risk　of　geological　hazards　should　be　paid　much　attention　in　reconstruction　process.　In　addition,　the　composed　measures　which　include　investigation,　monitoring,　avoidance　should　be　taken　to　prevent　the　geological　disaster　after　the　quake.