Quantitative structure-activity relationship(QSAR)is a research method that is currently widely used to predict the behavior of substances,and it has been widely used in the research of substance toxicity prediction,which is conducive to saving early experimental time and saving costs.This paper reviews the classic QSAR research history and modeling methods,and classified QSAR models based on dimensions,and discussed the application of this method in environmental chemistry,pesticides,mixtures and other related fields of toxicity prediction in recent years.