Abstract:The objective of this study was to evaluate effects of extruded and un-extruded different cereals（e.g.，rice，corn，wheat，oats and buckwheat）on the nutritional components，which include the concentration change of starch，amylose，crude protein，crude fat，reducing sugar，dietary fiber and mineral element.The results showed that，the contents of starch，crude protein，crude fat and mineral element in extruded rice，corn，wheat，oats and buckwheat were slightly decreased（P＞0.05）and reducing sugar content were slightly increased（P＜0.05），however，amylose and dietary fiber slightly increased（P＞0.05），slightly increased to some extent.