Teng Bing of Northeastern University in China synthesized and prepared high-purity zinc (Ⅱ) methionine chelate in the laboratory in the late 1980s, and its structure was confirmed to be a chelate by infrared analysis. Yan Lixin and others demonstrated the comprehensive average relative biological titer of various zinc sources in their paper on the nutritional effect of methionine chelated zinc on chicks. The utilization rate of chelated zinc is obviously better than that of zinc sulfate. It shows obvious anti-phytic acid and high calcium side effects. Judging from the activity of serum alkaline phosphatase, zinc content in tibia and wing feathers and zinc deposition rate, zinc methionine chelate is obviously better than zinc sulfate. In 1990s, China's animal nutrition and feed industry showed an obvious increase in interest in trace element amino acid chelates. Many reviews and articles were published to introduce the feed and nutritional functions of trace element amino acid chelates. There are also their own synthetic chelates or patents, or they are provided for animal testing. Harbin, Wuxi, xi, Guangzhou, Shanghai, Chengdu, Changsha and other places have launched enterprises of different scales to produce various chelate products and put them on the feed additive market. With China's entry into WTO, the feed chelate industry is also facing competition from foreign counterparts.