Method for identifying soil heavy metal pollution priority control factors and application

The invention relates to the technical field of heavy metal pollution treatment, in particular to a method for identifying soil heavy metal pollution priority control factors and application, and the method comprises the following steps: S1, taking surface soil (20cm), and testing the total amount of soil heavy metals; s2, performing source analysis on the content of the heavy metals in the soil by using a positive definite matrix factorization model (PMF); and S3, evaluating the human health risk of the soil environment by adopting a health risk assessment (HRA) model. According to the heavy metal input and output flux calculation method for the farmland affected zone of the colored contaminated site, the dynamic balance relation of soil heavy metal accumulation is defined by constructing a heavy metal pollutant input and output flux list, and soil samples are continuously collected and monitored; the method plays an important role in determining the migration balance of the heavy metals in the farmland infl