This　paper　gives　a　brief　description　of　the　relationship　of　geotechnical　disasters　and　damage　to　the　lifeline　systems　in　the　Wenchuan　county,　Sichuan　province　due　to　the　strong　earthquake　invading　(M=8.0)　on　May　12,　2008.　Site　investigation　of　geotechnical　disaster　and　earthquake　damage　of　main　lifeline　systems　near　the　epicentre　and　main　active　seismic　fault　zone　was　conducted,　and　results　were　summarized　as:　(1)　lifeline　systems　malfunction　or　completely　failure　is　mainly　attributed　to　geotechnical　disasters.　landslide,　sink,　debris　and　collapse　are　the　important　factors　to　damage　the　transportation　and　water-supply　systems;　(2)　the　intensive　faulting　movement　was　irresistible　to　the　power-supply　system,　the　pipeline　system,　bridge,　highway,　dam;　(3)　Seismic　performance　of　some　of　lifeline　systems　under　secondary　disasters　induced　by　geotechnical　disasters,　though　elements　of　lifeline　systems　didn＇t　occure　any　structure　damage.　(4)　The　damage　of　some　elements　of　lifeline　systems　was　affected　by　the　site　amplification　of　ground　shaking　and　liquefaction　due　to　poor　local　ground　condition　or　landform.　The　investigation　indicates　that　the　high　damage　ratio　of　lifeline　systems　was　found　where　geotechnical　disasters　are　heavy.　Some　fitting　designs　of　lifeline　system　have　better　earthquake　resistance.　This　investigation　also　shows　that　reasonable　site-selection　is　the　most　important　step　to　mitigate　the　seismic　risk　or　reduce　seismic　hazard　in　a　great　degree.