The　diversion　tunnel　for　Jinping　II　Hydropower　Station　is　currently　the　largest　group　of　hydropower　tunnels　in　China.　The　surrounding　rock　masses　of　the　tunnel　are　of　long　length,　deep　embedded　depth　and　technical　difficulties　of　construction,　which　is　a　variety　of　geological　hazards　such　as　water　bursting,　rockburst,　collapse　and　so　on.　It　is　necessary　to　choose　the　safe　and　rapid　excavation　technology　for　ensuring　construction　safety　and　power　generation　schedule,　so　a　large　number　of　studies　and　analysis　of　the　technology　of　TBM　construction　is　conducted;　and　the　results　are　as　follows:　TBM　construction　method　is　feasible　not　only　in　the　view　of　rock　drillability　and　cutter　wear　but　also　from　rock　deformation　and　fracture;　but　it　is　some　advantage　for　the　traditional　drill　and　blast　method　to　deal　with　issues　such　as　groundwater,　rockburst,　large　deformation　and　so　on,　and　which　has　a　better　protective　effect　in　the　personnel　safety.　It　can　do　better　in　solving　a　series　of　engineering　problems　on　the　construction　process　if　using　the　continuous　improvement　of　construction　technology　and　supporting　tools　which　come　from　between　geological　prediction　and　construction.