Lignite　is　a　reliable　raw　energy　material　with　abundant　supply　worldwide.　However,　the　efficient　use　of　lignite　to　generate　power　remains　challenging,　because　lignite　exhibits　undesirable　characteristics,　including　low　heating　value　and　high　moisture　content.　Despite　these　disadvantages,　the　efficiency　of　lignite-fired　power　plants　can　be　increased　by　predrying　lignite.　In　this　study,　a　predried　lignite-fired　power　plant,　which　uses　steam　extracted　from　steam　turbines　as　a　heat　source　to　dry　lignite,　was　simulated　using　Aspen　Plus.　This　study　then　analyzed　the　performance　of　the　predried　lignite-fired　power　plant　at　rated　and　partial　loads　on　the　basis　of　the　thermodynamics　principles.　This　study　also　examined　the　influence　of　lignite　predrying　on　the　exergy　losses　and　destructions　of　the　power　plant　components.　Results　indicate　that　the　exergy　destructed　the　combustion　process　decreases　significantly　because　of　lignite　predrying,　by　5.78　percentage　points.　The　plant　thermal　efficiency　based　on　the　lower　heating　value　of　raw　lignite　relatively　increases　by　4.35%.　The　efficiency　improvement　of　the　power　plant　reduces　as　the　load　ratio　decreases,　because　exergy　is　destructed　in　the　admission　opening,　which　is　used　to　control　the　pressure　of　the　steam　leading　to　the　dryer.　The　integration　of　the　dryer　saves　energy　only　when　the　load　ratio　is　＞50%.