In　air　transport,　the　growing　demand　in　energy　along　with　rising　fuel　costs　is　endangering　civil　aviations　optimistic　outlook,　besides,　concerns　have　focused　more　on　addressing　aviations　impact　on　greenhouse　gas　emissions.　Based　on　the　analysis　of　the　necessity　of　carrying　out　the　work　of　energy　saving,　the　paper　analyzes　the　factors　that　have　great　influences　on　the　energy　economy　from　the　multi-criteria　point　of　view,　establishes　multi-criteria　decision　analysis　model,　and　puts　forward　an　analysis　system　for　energy　conservation　in　civil　aviation　which　provides　a　theoretical　basis　for　the　administrators　to　work　out　energy-efficient　solutions.