Taking 0.27mm gauge high magnetic induction grain‑oriented silicon steel produced by the post‑nitriding method as the research object, the effects of normalizing temperature on the precipitation behavior of inherent inhibitors and primary recrystallization structure were systematically studied through laboratory simulation of normalizing and decarburization annealing processes. The results show that the normalizing temperature has a significant regulating effect on the precipitation size and distribution density of inhibitors. When the temperature of the high‑temperature stage of normalizing is 1115℃, the proportion of precipitates with diameter below 100nm in the normalized sheet reaches 67%. The fine inhibitors can effectively pin the grain boundary migration, refine the primary recrystallized structure, and reduce the average grain size to 17.4μm. After decarburization and nitriding, the proportion of fine precipitates below 100nm is further increased to 80%, which creates favorable conditions for the preferential growth of subsequent secondary recrystallization.