To investigate the security risk of sodium dichloroisocyanurate used as a disinfectant in food production establishment. Analyzing the disinfection effects of sodium dichloroisocyanurate and the toxicity of its by-products. When sodium dichloroisocyanurate is used as a disinfectant, it is rapidly dechlorinated to Cyanurate. There is a low acute toxicity of cyanurate on mammals; its oral LD50 is 7700 mg/kg body weight for rats; and related information suggests that nephrotoxicity could be induced when melamine and cyanurate are co-ingested. There are hidden dangers of using sodium dichloroisocyanurate as disinfectant in food production establishment. For this reason, the related departments of the government must take countermeasures actively to formulate corresponding technical standards to standardize the use of sodium dichloroisocyanurate.