Non-oriented silicon steels containing different mass fractions of lanthanum were prepared using a high-frequency suspended furnace.Microstmctures were observed by a metallographic microscope and micro-orientations were analyzed by a scanning electron microscope (SEM).The results showed that at the annealing temperature of 870 ℃,recrystallization started at 90 s and completed at 120 s during annealing.Without lanthanum,no matter Cube or { 111 }<110> grains,recrystallized grains nucleated mainly in deformed { 111 }<110> and { 113}<031> grains.With lanthanum,however,they nucleated in the deformed {110} and {112}<132> grains.This indicated that addition of lanthanum changed the micro-orientation relationship between new grains and the matrix.