In　this　paper,　a　Fuzzy-PID　model　was　established　for　a　600MW　supercritical　lignite-fired　boiler　through　GSE　software,　of　which　the　control　effect　was　tested　and　compared　with　conventional　PID　control.　The　research　result　showed　that　when　hot　flue　gas　extracting　percent　stepped　from　100%　to　50%,　the　minimum　of　live　steam　temperature　of　Fuzzy-PID　strategy　was　higher　by　0.21℃　than　conventional　PID　strategy,　while　the　maximum　of　which　was　lower　by　0.15℃,　and　the　time　of　dynamic　response　reduced　by　477s;　Under　the　same　condition,　the　minimum　of　reheat　outlet　steam　temperature　of　Fuzzy-PID　strategy　was　higher　by　0.32℃　than　conventional　PID　strategy,　while　the　maximum　of　which　was　lower　by　0.49℃,　and　the　time　of　dynamic　response　reduced　by　387s.　It　turned　out　that　rapidity　and　stability　of　steam　temperature　adjustment　under　Fuzzy-PID　control　was　better　than　conventional　PID　control,　proving　that　this　Fuzzy-PID　strategy　could　improve　the　quality　of　common-used　control　system.　The　consequence　had　certain　significance　on　power　plant　steam　temperature　control　system　optimization.　©　2017,　Science　Press.　All　right　reserved.