Abstract: Using passive samplers, the temporal variations of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) were investigated during the excavation process of an abandoned pesticide-contaminated site. HCH and DDT concentrations in the air samples from the contaminated site and its surrounding area significantly increased with the excavation process. The HCH and DDT concentrations in the air samples were 23.36-494.39 ng/m³ (average 141.54±114.54) and 14.78-539.09 ng/m³ (average 201.69±143.88), respectively, with highest values in the core area of the excavation. The minimum values of the pollutants-HCH of 4.36-29.00 ng/m³ (average 13.59±7.75) and DDT of 3.03-42.88 ng/m³ (average 13.37±11.53) were found in the residential air samples. The monomer composition in the air changed during the excavation process; β-HCH, δ-HCH, o,p′-DDT and p,p′-DDT composition ratio increased. The HCH and DDT concentrations in the air samples were positively correlated with temperature, and negatively correlated with wind speed. Therefore, excavaion under high temperature or strong conrective weather conditions should be avoid to reduce fugitive dust as possible, and decrease the risk of secondary pollution.