Owing　to　its　unique　nanostructure　with　nanosized　strain　domains　embedded　in　the　austenite　matrix,　ferromagnetic　strain　glass　has　recently　been　found　to　yield　low-field　large　magnetostriction,　providing　an　important　principle　for　designing　magnetostrictive　materials.　Considering　that　magnetostriction　maximizes　in　the　vicinity　of　the　strain　glass　transition　temperature,　T-g　that　is　usually　below　room　temperature;　it　has　inspired　the　search　for　a　feasible　approach　to　further　enhance　room　temperature　magnetostriction　from　an　application　point　of　view.　Here,　we　report　that　approaching　the　martensite　crossover　through　applying　proper　stress　during　annealing　can　effectively　enhance　room　temperature　magnetostriction　of　a　random　polycrystalline　Fe67.7Pd32.3　strain　glass　alloy　with　T-g　of　133K　from　73　to　95ppm　by　similar　to　30%.　The　comparative　results　reveal　that　annealing　with　higher　stress,　e.g.,　15MPa,　will　deteriorate　magnetostriction　performance　due　to　stress-induced　martensites.　Further　transmission　electron　microscopy　study　reveals　that　enhanced　magnetostriction　is　due　to　slightly　enlarged　strain　nanodomains　because　the　proper　bias　stress　provides　an　extra　driving　force　toward　the　martensite　and　helps　to　overcome　the　kinetic　limitation,　which　may　be　a　universal　approach　to　achieve　large　magnetostriction　in　ferromagnetic　strain　glass.　Published　under　license　by　AIP　Publishing.