During the period from 2017 to 2020, the profit of starch enterprises has experienced three main stages, the first stage is: the downstream demand for corn starch is obviously expanding rapidly, and the profit of starch enterprises is good, basically in the range of 100-230 yuan/ton, and the main growth of the downstream demand is the starch sugar industry, and in 2016, due to the large price difference between white sugar and starch sugar to reach a new record high in all the years, and again Once again stimulate the growth of substitution, coupled with the growing acceptance of starch sugar, beverages, food and other markets overall use of the field is also expanding, starch sugar production in 2017 exceeded 11 million tons, reaching 11.05 million tons. 2018 production to maintain the trend of growth, the annual output reached 11.54 million tons, the rapid expansion of the starch sugar market, so that the profit of the corn starch industry is still available. However, entering the beginning of 2019, which is the second stage shown in the figure, the capacity of the corn starch industry expanded rapidly, and the peak of production appeared in 2019, the annual production of commodity starch was 18.46 million tons, and in the case of rapid growth in capacity and production at the same time, the profit of the corn starch industry appeared to shrink rapidly, and during this time, there was a loss of cash flow of some enterprises, and the overall operation of the enterprise was difficult to increase. Let's look at the third stage: into December 2020 - January 2021, raw material corn prices rose rapidly, coupled with good downstream demand for starch, cost and demand *** with the support of the premise, the price of corn starch climbed all the way up to the, starch enterprise profits also appeared to be significantly better, and even break through the 2020 new high.