AZ91 Dplate slab was fabricated successfully by twin-rolling semi-solid rheo-rolling casting technology,in which semi-solid slurry was prepared by low superheat pouring with a shear field（LSPFS）.Microstructure and texture of the semi-solid sheet slab were observed by OM（optical microscope）and XRD（X-ray diffraction）.The results reveal that the sheet slab is composed of primary Mg phase and Mg17Al12 phase.Along the cast-rolling direction,volumetric fraction of primary phase in the back-end sheet slab is higher than that in the front-end as a result of flow velocity of liquid phase faster than solid phase in semi-solid slurry,meanwhile,grain size in the surface is finer than in the centre of the sheet slab because of cooling effects of roller face on sheet slab.Obvious（0002）basic plane texture is absent in the middle region of transverse sheet slab,while significant orientation of cone plane（1011）and prism plane（1010）at Mg matrix can be observed at edge position.