(1) corn deep processing varieties are few, the structure is unreasonable. Primary processing of food accounted for 65%, the primary processing of industrial raw materials accounted for 20%, deep processing accounted for only 15%. (2) China's corn processing industry development is relatively slow, few large-scale enterprises, small and medium-sized processing capacity is poor, corn product variety is small, it is difficult to achieve economies of scale and improve product quality. (3) The localization level of processing equipment is generally low. Corn deep processing technology is backward, high processing costs, both quality and quantity can not be compared with developed countries, can not meet the needs of domestic and foreign markets. The investment in scientific and technological development is small, the technical level is low, the development ability is limited, and the formation of new product varieties is small. (4) Most corn processing enterprises are still using traditional production technology, deep processing industry is still stuck in the primary product processing level, corn processing industry chain is short, low value-added products.