Due　to　the　difficulty　in　calculating　the　stress　distribution　induced　by　laser　strengthening　on　the　roll　surface,　the　numerical　simulation　technology　is　adopted　in　this　article.　Based　on　the　coupling　effect　between　laser-induced　stress　field　and　sharply-changing　temperature　distribution,　the　temperature　simulation　results　can　be　regarded　as　the　initial　conditions　to　establish　FEM　model　for　stress　simulation.　Considering　the　thermo　elasto-plastic　performance,　the　stress　distribution　curves　at　different　locations　and　different　time　can　be　obtained.　The　simulation　results　indicate　that　the　stress　perpendicular　to　the　scanning　direction　is　the　prominent　component.　Furthermore,　the　stress　will　change　from　compressive　stresses　to　tensile　ones　without　considering　the　phase　transformation　after　laser　treatment,　and　which　can　influence　the　crack　generation.　Moreover,　the　directions　of　principle　stresses　are　basically　correspondent　to　the　coordinate　directions,　but　they　will　alternate　with　the　change　of　stress　magnitudes.