Abstract:Fagopyrum tataricum was used as raw material， then using alkali extraction and acid precipitation method to extract protein complex， using the single factor experiment and response surface software to optimize the best protein extraction technology， the optimization results was extracting time 50 min， olid-liquid ratio 1 ∶ 12（g/mL）， extraction temperature 55 ℃， pH 10.0. Removed the flavonoids and lipids in tartary buckwheat protein by n-hexane. Then， hydrolyzed tartary buckwheat protein into polypeptide solution by alkaline pro－ tease. So we can research on the total antioxidant capacity， superoxide anion radical， hydroxyl free radical and DPPH radical scavenging activity of enzymatic hydrolysate with different degree of hydrolysis. The result showed that the enzymatic hydrolysates above，all had antioxidant ability. But they had the different radical scavenging activity， the best was followed by DPPH·and nearly had no·OH scavenging activity.