Abstract: The contaminated site poisoning incidents of volatile organic compounds (VOCs) occurred frequently. Many numerical simulation models have been established to calculate the risk of underground pollutants. Johnson & Ettinger model (J&E model) is the most widely used tool for evaluating vapor intrusion potential because of its simplicity and convenience. In this paper, a scale model was developed to simulate the process of 1,1,1-trichloroethane vapor intrusion, discuss the factors of vapor intrusion and validate the accuracy of J&E model. The purpose is to provide theoretical and technical support for pollution remediation of volatile chlorinated hydrocarbon contaminated sites. The obtained results indicate that the factor with the greatest impact on migration rate among the three ones in this paper is soil porosity, followed by the initial contaminant source concentration and the source depth. There is a relationship between the attenuation factor (F_V) and the soil properties. When the soil porosity increases from 54.5% to 61.3%, F_V values of three soils are decreased by 22%, 27% and 34%, respectively. When the source depth increases from 10 cm to 30 cm, F_V values of three soils are decreased by 15%, 21% and 26%, respectively. Finally the results of the experiment with those from J&E model prediction was compared to validate the accuracy of the model. The relative errors of the partition coefficient (α_sg) of soil A', B' and C' were 13.3%, 10.6% and 8.8% respectively, the relative errors of migration and attenuation coefficient (β) ranged between 0.5% and 24.2%. In terms of the accuracy of J&E model, it was more suitable for contaminated sites with relatively shallow pollution sources and large soil porosity. When the pollution source was deeper, the deviation of model prediction became larger no matter how the soil porosity changed.