Aflatoxin is mainly found in moldy cereals, such as corn, wheat, barley, oats, rice, etc.. In addition moldy peanuts, soybeans, also more often appear aflatoxin. Moldy nuts, cottonseed, vegetable oil and meat products may also contain aflatoxin. Aflatoxin is generated by Aspergillus flavus and Aspergillus parasiticus metabolites, if the food or feed is not dried in time, or improper storage, such as preserved in a humid environment, opened and not sealed, etc., it is easier to appear Aspergillus flavus, Aspergillus parasiticus, which produces this type of toxin. Aflatoxin is more toxic, more toxic than organic pesticides, belongs to a class of carcinogens. Large intake can cause damage to liver tissue, in serious cases may cause liver cancer, and even life threatening, such as the intake of large amounts of aflatoxin caused by acute poisoning, can lead to fatty degeneration of liver cells, etc., while the spleen and pancreas can have less damage. If the intake continues for a long time, it may lead to chronic poisoning, mainly manifested as liver cirrhosis. Therefore, if food is found to be moldy, it should not be consumed to avoid damage to the human body.