With the continuous improvement of people's living standards, the demand for meat, eggs, milk and edible vegetable oil has increased in recent years, which has led to the rapid development of the domestic vegetable oil press industry. Taking the development of soybean processing industry as an example, since the release of soybean imports in China in 1996, foreign investment began to enter in 1999. By 2000, China had about 100 tons of soybeans with a daily pressing capacity of more than 300 tons, and the daily pressing capacity of soybeans was 6. 40,000 tons, the average crushing scale of a single plant is 600 tons, and the annual soybean crushing capacity exceeded 10 million tons for the first time. By the end of 2001, China's daily-pressed soybean capacity had increased to 107,000 tons, reaching 202,000 tons at the end of 2004 and 254,000 tons at the end of 2005. By the end of 2006, China's daily-pressed soybeans had more than 300 tons of soybeans. More than 170, the daily pressing capacity of soybeans reached 270,000 tons, and the average crushing scale of a single plant exceeded 1,500 tons. Based on an annual operating rate of 300 days, the annual processing capacity of soybeans can reach 81 million tons. During the period from 2000 to 2006, China's daily pressed soybean capacity increased by 3.2 times. At present, there are 11 large oil plants with a daily processing oil consumption of 6,000 tons, 5 of which are in China, namely Jiangsu Zhangjiagang Donghai Grain and Oil (12,500 tons/day), Guangxi Fangchenggang Sea Oil (7,500 tons/day), Hebei Qinhuangdao Jinhai Oil (7000 tons / day), Lianyungang Yihai oil (6000 tons / day) and Hebei Sanhe Huifu grain and oil (6000 tons / day). The group with the largest oil processing capacity in the country is beneficial to Haiyou, COFCO, Jiu San Grease, Dalian Huanong and Dalian Hualiang. These enterprises have achieved a daily processing capacity of over 100,000 tons.