Mesoporous silica material was synthesized under acidic conditions in the presence of cationic surfactant as templating species. It has been studied the penetration phenomena of polyethylene oxide(PEO) into mesoporous silica. From the result of X-ray diffraction(XRD) experiments, polymer/mesoporous silica sample has been showed that pore size hasn't been changed even polymer were penetrated into pores of mesoporous silica. It was known that the amount of PEO chains penetrated into mesoporous silica pores has large effect on the reaction time. And the areas of the endotherm corresponding to the crystalline PEO was reduced by the study of differential scanning calorimetry (DSC)