Amino acids produced from starch as raw materials include isoleucine, arginine, and succinic acid. The world demand for amino acids is growing rapidly. Organic acids produced from corn or starch include citric acid, lactic acid, malic acid, itaconic acid, and oxalic acid. Among them, the output of citric acid is relatively large. Citric acid is widely used in the food industry, pharmaceutical industry, washing industry, textile industry, and cosmetics industry. The application of citric acid in non-food industries is expanding day by day. Increments at a rate of 5%. China's citric acid production ranks first or second in the world, but its export volume ranks first, with an annual export of about 200,000 tons. In the past, the production of citric acid in China mainly used dried potatoes as raw materials. Due to the high yield of corn raw materials, the Taihua factory has switched to corn raw materials. From the industry point of view, there is a trend to switch to corn raw materials. Lactic acid is mainly used in the food industry, accounting for about 50% of the total lactic acid. The world demand is 130,000-150,000 tons, still growing at a rate of 5-8%. Many countries have developed polylactic acid biodegradable plastics, and lactic acid has a large potential market for growth. Other organic acids are also generally developing trends.