The poly(laurylacrylate), PLA, polymers were prepared by an emulsion polymerization method. The laurylacrylate, LA, were used as the starting materials and ethyleneglycol dimethacrylate, EGDMA, as the crosslinker and benzoylperoxide as the initiator. The prepared PLA polymer was used to measure the oil-absorption capacity under various conditions and absorbed fastly each oil for seven types of oils within 60 min at temperature range 25 ℃ to 65 ℃. The maximum oil-absorption capacity of PLA formed shown at the condition of LA 99.867 wt% and EGDMA 0.133 wt%. The oil-absorption capacities increased with the increase of oil temperature and largely depended on the oil types. The decreasing order of oil-absorption capacity with the increase of temperature was the order of chloroform>>toluene>o-xylene>THF>decane>octane>hexane. We introduced Wilson model to construct the thermodynamic model on swelling equilibria. The model consists of two kinds of chemical potentials which they are mixing chemical potential(Δμmix) and elastic deformation chemical potential(Δμel). The λ12-λ11, which is the interaction energy between the molecules designated in the subscripts, decreased with the increase of oil-absorption temperature. It can be seen that the decrease of interaction energy brings about the increase of Wilson parameter(Λ12) between oil(1) and polymer(2) component.