Grain and oil crops was always faced with the problem of fungal diseases. Fungi produce mycotoxin under certain conditions, which not only caused food waste, but also seriously endangered the health of human and animal. Physical, chemical and biological detoxification methods can remove some mycotoxin, but there were some problems to be considered, such as desorption, residual solvent and complex degradation product. In recent years, the photocatalytic technology had achieved great process in degradation of mycotoxin. In this work, the latest progress of photocatalysis technology in mycotoxin degradation in grain and oil was briefly summarized which providing a reference for further understanding the mechanism of photocatalytic degradation and promoting the application of photocatalytic mycotoxin degradation in grain and oil crops.