Abstract: Centrifuge modeling is extensively used to investigate Non aqueous Phase Liquids (NAPLs) transporting and infiltrating in partially saturated soils. It can not only reduce the sample dimensions, shorten experiment duration, but also lessen fingering instability.Resistivity probes, hydrophilic tensiometers and hydrophobic tensiometers were developed to estimate water saturation, water capillary force and NAPLs capillary force, respectively.And video recording and image analyzing were carried out to obtain the NAPLs plumes at different times. Homogeneous and layered samples were tested to understand the movement, entrapment and mobility of NAPLs in unsaturated soils.