Abstract:The pollution degree of explosives in soil of a military ammunition destruction site in Jilin Province and the occurrence state of explosives in soil were studied in order to provide targeted strategies for remediation of explosives and heavy metals contaminated soil。collected surface soil samples from the incineration area of an ammunition destruction plant, analyzed its physical and chemical properties and the content of common heavy metal elements, tested the content of explosive contaminants in the whole soil sample and soil samples of different particle sizes, and combined the thermogravimetric-Fourier analysis Transformation infrared spectroscopy (TGA-FTIR) characterizes the thermodynamic behavior of explosive contaminated soil samples, discusses the occurrence state of explosive pollutants, and the characteristics of explosive and heavy metal combined pollution. The soil contains high concentrations of TNT, DNT, ADNT, RDX and other explosive pollutants and their degradation products, and shows a tendency to enrich soil fine particles. The total concentration of TNT in the entire soil sample reached 1.66×104 mg·kg-1, which is far higher than the EPA recommended soil TNT guide limit, RDX exceeds the guide limit for the soil environment; The destruction activities also resulted in an increase in the concentration of Pb, Cu and Zn heavy metals in the soil to 400 mg· kg-1,318 mg·kg-1 and 1030 mg·kg-1, respectively. Affected by factors such as heavy metals and organic matter in the soil, the pyrolysis behavior of explosive pollutants that have been aged for a long time in the soil is significantly different from that of free explosive molecules, and the pyrolysis temperature increases and the process prolongs. In the remediation of explosive contaminated soil in the destruction zone, the study of the interaction between explosive pollutants and heavy metals should be strengthened, and a collaborative remediation strategy should be adopted in the practice of remediation.