From July to December in 2018, the polyester market price rose and fell sharply, which led to the wide fluctuation trend of industry profits of related products in the polyester market. However, with the continuous repair of the polyester market, the overall profitability of the polyester Market in 2019 has been steadily improved, showing a trend of shock push up, and the overall profitability of related products in the polyester market is slightly higher than that in the same period of last year. Take the fiber grade PET with poor profitability as an example. According to the statistics of jinlianchuang, as of April 19, the average daily profit of the fiber grade pet industry was 127 yuan / ton, a year-on-year increase. The main reason is that the self-control ability of polyester factory industry is constantly enhanced. Before the lunar new year, the downstream continued to focus on purchasing raw materials, resulting in the rapid decline of polyester industry inventory. In addition, in order to prevent the downstream demand from being overdrawn in advance, polyester factories also increased the intensity of equipment maintenance during the Spring Festival. Although the polyester market is still facing the risk that the downstream demand will gradually weaken, and the polyester factory inventory may enter the stage of gradual accumulation, the steady operation of the polyester market is the source of confidence for the polyester factory. With the "new business cycle" of polyester market going away, stable operation may become the new normal of polyester market. It is expected that polyester factories will enhance their own industry self-control and seek new breakthroughs in the steady development of polyester market!