The present invention discloses a glutamic acid rotating crystal method. the method includes following steps: adding transformation mother liquor to alpha-glutamic acid crystal to make crystal suspension; heating up to 55-85 DEG, washing water, agitating, thermal insulation; centrifugal separation to obtain glutamic acid; mixing glutamic acid and water to make glutamic acid suspension; adding sodium hydroxide or gourment powder mother liquor, controlling sodion concentration as 0.2-2.0% in volume percent concentration, heating up to 70-95 DEG, rotating crystal for 0.5-3 hours; cool down, agitation for producing crystal. Technics of the invention is simple, which greatly improved crystal rotating speed and glutamic acid purity; reducing loss of crystal, reducing dosage of sodion and transformation temperature, reducing dissolution of the glutamic acid and generation of the pyroglutamic acid, improving products quality and yield; saving a great amount of processing cost for gourment powder refining, and reducing consumption of electric, water, vapor and generation of sewerage in gourment powder production.