cprecisionfeedinginrumenprotectedlysinecanimprovethesheepgrowthtrend,withthefinefeedcontaining0.45%ofrumenprotectedlysinewasbest,finefeedingadded0%,0.15%,0.3%ofrumenprotectedlysinegroupswerenotsignificant(P>0.05),whilethefinefeedadd0.45%and0%,0.15%,0.3%ofrumenprotectedlysinewereimprovedsignificantly(P<0.05);parison,finefeedinrumenprotectedlysineonslaughterweight,carcassweightwithincreasingtrend,tonicmaterialisaddedbetween0%and0.15%and0.3%and0.45%,theeffectisnotsignificant(P>0.05),forthecarcassshapeindexintheslaughterratedifferenceswerenotsignificant(P>0.05).prehensiveanalysisofshapegainweightandcarcass,thetestsheepconcentrateadded0.45%supplementformulationsofrumenbypassaminoacidlysinebesteffect.Keyword:rumenprotectedlysine,rumendegradationrate,smallintestinedigestibility,beefcattle,sheepIV