The extruded Mg-7Y-1Nd-0.5Zr(wt％)alloy were performed to the same strain hot rolling with different temperatures.The microstructure and texture evolution of the sheets were investigated by optical microscopy(OM),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),and electron back-scattered diffraction(EBSD).The results indicate that the microstructure becomes homogeneous after hot rolling process and precipitated phase distributes at grain bound-aries along rolling direction.With the increase in rolling temperature,the grains of sheet grow up.The sheet rolling at 400 ℃ is composed of recrystallization grains,the necklace of the precipitated phase in the grain boundaries and exces-sive dislocations.The structure of necklace of the precipi-tated phase is fcc structure with lattice constant of a = 0.75 nm.With rolling temperatures increasing from 400 to 450 ℃,the content of recrystallized grains in volume fraction with relatively random orientations increases sig-nificantly.Compared with the rolling process at 400 ℃,the amount of precipitated phases is reduced at the grain boundary,and the precipitated phase begins to appear in the grain interior when rolling at 450 ℃.The structure of the precipitated phase is fcc with lattice constant of a = 2.22 nm.The recrystallization grains begin to grow in the rolling process at 500 ℃.The basal texture is obviously produced during the rolling process at 400 and 450℃;however,the basal texture is weak in the rolling process at 500 ℃.