Abstract: Using methylmethacrylate(MMA),butylacrylate(BA), acrylicacid and hydroxyethylmethacrylate(HEMA) as raw materials, BPO as initiator,dimethylbenzene and ethylacetate as solvent, a series of polyacrylic resins(PAR) were synthesized by solution free radical polymerization technique,and were studied in various conditions, such as the process of synthesis,the reaction temperature,and the amouts of initiator.The gel permeation chromatography（GPC）result showed that the molecular weight distribution coefficient of PAR was 1.9,The thermal gravimetric showed that it was at 378.59℃ when PARs mass lost 20%,The differential scanning calorimetry(DSC)test showed that the glass transition temperature was 27.8℃.