Abstract: Using twin roll thin strip continuous casting technique, the 3.98%Si-0.71%Al no-oriented silicon steel strip in thickness of 2.4 mm was produced. The microstructure, precipitates, texture, and magnetic properties of the sheet after normalizing, cold rolling and annealing at different temperatures were studied. The results show that with annealing temperature increase, the grain size and uniformity of annealed sheet increased. The main precipitates in coarse size of 0.5-2.5 μm in annealed sheet were AlN and(MnS+AlN)composite. The texture of annealed sheet changed a lot along thickness. In the surface and 1/2 layer, the main texture was 100, but 111 texture was also found in the center layer, while it was 112 in the 1/4 layer. The iron loss and magnetic induction of the sheet decreased as the annealing temperature increased.